问题

Why didn’t you go to yesterday’s meeting? —I would have but I ______too busy working on the important experiment

A:had been
B:was
C:were
D:am

正确答案是：

同类题型

ElizabethⅡis often to be richest woman in the world. , her personal wealth seems rather small.

He will tell you _____ he expects will win such a match.

Theprofessorsaidthatyourdiscoverywas_____________．

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