单项选择题

I have my teeth ______ once every year.

[A] checked
[B] to check
[C] check
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单项选择题
Be quiet and ______ your work.
[A] you do
[B] to do
[C] do
单项选择题
Look, ______ in his usual T-shirt.
[A] here comes Ronnie
[B] comes here Ronnie
[C] Ronnie here comes
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