46. You are required to write a paragraph to explain the effect of social media on university students.
Which of the followings is the most appropriate topic sentence (to be put at the beginning of the paragraph to introduce the main idea)?
(A) Based on their functions, social media apps can be classified into three types.
(B) Messenger is the most popular social media among university students.
(C) Different from Facebook, Instagram emphasizes on interacting features.
(D) LINE has impacted on students' communication in different aspects.

42. In the first paragraph, what does "they" refer to?(A) Resolutions.(B) Psychologists.(C) People.(D) Goals.

43. What is the purpose of the second paragraph?(A) To give reasons for the idea in the first paragraph.(B) To provide examples for the idea in the first paragraph.(C) To argue against the idea in the first paragraph.(D) To raise questions about the idea in the first paragraph.

44. Which of the followings has the closest meaning to the phrase "stick to" mean in the second paragraph?(A) To extend something outward.(B) To continue doing something.(C)To show loyalty to something.(D)To rely on something.

45. What can be inferred about the author's attitude towards New Year resolutions?(A) Confused.(B) Optimistic.(C) Sarcastic.(D) Negative.

47. You are required to write a paragraph to compare the difference in gasoline cars and electric cars.Which of the followings is the most appropriate topic sentence (to be put at the beginning of the paragraph to introduce the main idea of the paragraph)?(A) The price for electric cars has declined because of the subsidiaries from the government.(B) Not only do electric cars save more money, they are also better for the environment.(C) Electric cars not only reduce noise pollution, but also slow down the rate of global warming.(D) The following four benefits of electric cars make them the best choice to buy for your next car.

48.__________.First of all, turn off as many "push” notifications as possible. You don't have to be interrupted by every "like" that your latest Instagram picture receives. Next, take distracting apps off your home screen. Keep the apps that you want to encourage yourself to use front and center, but move anything to folders on your second page of apps. Which of the followings is the most appropriate topic sentence (to be put at the beginning of the paragraph to introduce the main idea of the paragraph)?(A) The following steps will help you stop checking your phone so much.(B) "Push" notification is the most annoying smartphone feature.(C) Turning off "push" notification is easier than taking apps off home screen.(D) "Push" notification is the main cause of distraction from smartphones.

49. People have been cutting back their meat consumption slowly but surely. According to a 2018 Dalhousie University poll study, this downward trend of consuming less meat is likely tocontinue - at an even faster pace.________The meat-free trend has become even more dramatic.Which of the followings is the most appropriate supporting sentence (to be put in the blank)?(A) This is likely to lead to a serious consequence of food shortage, especially meat, in developing countries.(B) Dietitians from Toronto General Hospital worried that this trend will have a negative effect on nutrient intakes.(C) This study suggested that university students need more incentives to reduce their meat consumption.(D) One-third of respondents indicated a willingness to reduce their meat consumption in the near future.

50. When you are in a safari vacation, the rule of thumb is to pack light. Your luggage may be limited to a small duffel bag, so try to limit your clothes to whatever is necessary. For example, bring enough clothes for two days only.______Then, you can dry the clothes in the sun.Which of the followings is the most appropriate supporting sentence (to be put in the blank)?(A) Safari camps generally provide laundry service for you to wash the clothes by hand.(B) You should avoid wearing white clothes because it attracts animals' attention easily.(C) Black and other dark colors are recommended because they are less obvious when they get dirty.(D) The best way is to dress in layers as the areas can be chilly in the mornings and late afternoons.

3. Answer A, B or C: If y = f(u) and u = g(x), where f and g are twice differentiable such that g'(x) = g(x), then equals...(A)(B)(C)

4. Answer A, B, C or D: If x is measured in meters, r(x) is a function of x and r is also measured in meters, and ρ is measured in kg.m, then what is the unit of (A) kg.m-1 (B) kg.m (C) kg (D) kg.m²