I can’t get through to the general manager’s office anyhow.

—— I can’t get through to the general manager’s office anyhow.

—— The line is busy. Someone _____ the telephone.

A.must use  B.uses  C.must have been using  D.must be using

雲舒展 1年前 已收到1个回答 举报

ceany欣儿 精英

共回答了395个问题采纳率:91.9% 举报

D

1年前

7
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