Nicole is a _____ language learner. Within a short period of time, she has developed a good command of Chinese and Japanese.
(A) convenient (B) popular (C) regular (D) brilliant
5. The scientists experiment successfully with the drug in the laboratory; now they need to
test it on human _____ .
(A) neighbors (B) volunteers (C) resources (D) survivors
50 Despite your failure to get any prize in this contest, you could try to do better next year since it is held _____.
(A) specifically (B) previously (C) voluntarily (D) annually