Question

【题目】--- Such a small mistake could have been avoided.

--- Yes. But I too nervous to see the zero.

A. am B. have been

C. was D. had been

Answer 1

【答案】C

【解析】

考查时态。句意：——这样一个小错误本来是可以避免的。——是的。但是我太紧张了，看不到零点。 由could have been avoided（本来可以避免）可知双方在谈论过去的事。故选C。