Beijing, an Olympic host city, receives_____large number of visitors every year.()
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What have you done to the_____girl?()
A. cry
B. to cry
C. is crying
D. crying
She_____to clean the room for me, because I'm always too busy.()
A. has
B. have
C. is having
D. to have
The girl_____under that tree is my sister.()
A. sitting
B. sits
C. is sitting
D. to sit
He_____10 yuan for the nice kite.()
A. spent
B. bought
C. paid
D. cost