He ________21 hours in space in 2003.A.spend B.spent C.spending
What’s she ? A. do B. doing C. does
We had a picnic the park . A. in B. on C. with
We are looking the picture. A. of B. from C. at
The ducks are . A. swim B. swam C. swimming
Yang Liwei the first man in space. A. was B. were C. are