Afterseveralyearsofobservation,theresearchgroup

問題詳情：

       After several years of observation, the research group ______ the conclusion that language acquisition is faster when students ______ to the situation where it is spoken.

A. has come to; expose                   B. have arrived at; are exposed

C. has concluded; are exposed         D. have reached; expose

【回答】

B

知識點：動詞

題型：選擇題