单项选择题

All ______ to Hong Kong were delayed because of bad weather.

A. fly
B. flights
C. flyings
D. flies
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单项选择题
I hope you'll advise me what ______ after class.
A. do
B. to do
C. doing
D. to be done
单项选择题
______ aloud is a very useful way to learn English.
A. Read
B. Reads
C. Reading
D. Being read
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