My father lost keys. Now he can’t get into the house the office or the garage (车库).A. a p

问题补充：

My father lost keys. Now he can’t get into the house, the office or the garage (车库).

A. a pair of

B. a piece of

C. a cup of

D. a set of

答案：

A. a pair of

B. a piece of

C. a cup of

(答案→)D. a set of

解析：句意：我爸爸丢了一串钥匙，现在他不能进家、办公室和车库了。A一双、一副B一片、一块C一杯D一串、一套，故选D。