Please give your opinion on _ to be a volunteer.
A. how
B. that
C. this
D. who
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_you arrive in London,please give us a call.
A. Whenever
B. when
C. who
D. whom
As the day goes on ,the weather gets _
A. worse
B. good
C. well
D. bad
Although they _ heavy work that day,they were all in high spirits.
A. did
B. do
C. does
D. done
Do not believe the rumor,no matter _repeats it.
A. who
B. which
C. that
D. this