Question

【题目】-------I knocked over my coffee cup.It went right over _______keyboard.

-------You shouldn't put drinks near _______computer.

A.the; / B.the; a

C.a; / D.a; a

Answer 1

【答案】B

【解析】keyboard是对话双方都已知的事物，所以其前用the；而computer表示类指，其前用a/the都可以。