Question

【题目】After the fun he has had during the holidays, the boy can’t ___ on his schoolwork.

A.try

B. concentrate

C. take

D. depend

Answer 1

【答案】B

【解析】句意：“放假玩儿了几天，这孩子没法集中精神上课。”concentrate on意为“聚精会神，集中思想”，符合语境；try on表示“试穿”，take on表示“雇用，承担，呈现”，depend on表示“依靠”。