. Everyone in our class was working hard and doing what we could a good college.A. EnterB

问题补充：

. Everyone in our class was working hard and doing what we could a good college.

A. Enter

B. to enter

C. Entering

D. entered

答案：

A. Enter

(答案→)B. to enter

C. Entering

D. entered

解析：可联系答.案.网客服索取。