单项选择题

She prepared the supper ______ instructed by her mother.

A. until
B. though
C. as
D. while

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单项选择题

There is no doubt ______ the company has made the right decision on the sales project.

A. why
B. that
C. whether
D. when

单项选择题

I ______ writing the paper as scheduled, but my mother's illness interfered. I hope you will excuse me.

A. am to have finished
B. was to have finished
C. was to finish
D. ought to finish

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