单项选择题

I ______ my breakfast when the morning post came.

A. had



B. had been having
C. have been having

D. was having
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单项选择题
Just as the builder is skilled in the handling of his bricks, ______ is the experienced writer in the handling of his words.
A. so

B. as
C. thus

D. equally
单项选择题
Three hours ______ the limit of this examination.
A. is

B. were

C. are

D. was
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