单项选择题

______. Please fasten your seat belt.

A. have landed
B. are landing
C. landed
D. land
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单项选择题
Almost all the main roads in the city center ______ by the end of next year.
A. will be widened
B. were widened
C. will have been widened
D. would be widened
单项选择题
There are a lot of ______ in Xinhua Children’s Hospital.
A. woman doctors
B. woman doctor
C. women doctors
D. women doctor
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