456. I accidentally _____ my knee on the basketball court and the ointment I applied helped soothe the pain.
(A) scraped
(B) spurred
(C) submitted
(D) sparked
574. After being bombed and savaged by the enemy troops, the city has been abandoned and now looks _______.
(A) sacred
(B) momentous
(C) desolate
(D) democratic
Lacking much knowledge about the moon, ancient people created many mysterious legends related to the moon. _(201)_ those legends are true or not, the moon is undeniably important to life on our planet. As the moon moves around the earth, _(202)_ its gravitational force creates tides on earth is something worth studying. With tides _(203)_ that feeds creatures inhabiting the seashore. The proof can be found in the fact _(204)_ crabs are able to find food in the intertidal zone while the tide is going out. In brief, without tidal movements, life in wetlands can _(205)_ be sustained.
Moreover, scientists have discovered that the moon helps keep the earth stable. That is to say, _(206)_ the moon’s mass, the earth would “wobble” on its axis, and different parts of the planet would point at the sun every year. Hard _(207)_ this might be for you to imagine, it is what keeps the earth’s climate from going nuts. Without stable and predictable weather conditions, people might _(208)_ themselves facing food shortages and other daunting problems.
Today, _(209)_ much more knowledge is learned about how the moon has constantly influenced us, this heavenly body is no longer merely a beautiful object that hangs in the night sky. Few people will _(210)_ the statement that without the moon, creatures on the earth will have trouble surviving. 【題組】201.
(A) No matter
(B) Whether
(C) Only if
(D) Even though
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