单项选择题

During the construction of skyscrapers, cranes are used to ______ building materials to the upper floors.

A. toss
B. tow
C. hoist
D. hurl
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单项选择题
When you have finished that book, don' t forget to put it on the bookshelf,______
A. do you
B. will you
C. don't you
D. won't you
单项选择题
They are teachers and don't realize ______ to start and run a company.
A. what it takes
B. what takes it
C. what they take
D. what takes them
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