You （）sick for five days. Maybe you should see a doctor
A. will be
B. are
C. were
D. have been
查看答案
It （）for ten days straight last December
A. snowed
B. was snowing
C. has snowed
D. had been snowing
Sarah （）the laundry when Nick stopped by to say hello
A. was doing
B. had done
C. does
D. has done
The company （）a new digital camera next week
A. sold
B. sells
C. will be selling
D. was selling
I'm very busy () for the exam now. Will you come again at some other time.
A. to prepare
B. prepared
C. to be preparing
D. preparing
微信支付 
支付宝支付