They are __________ books now.
A.read B. reading C.reads
He often _______ TV on Sunday
A. watches B. watches C.watched
I ________ to the zoo yesterday.
A. go B. went C. goes
Yang Liwei ________ about twenty-one hours in space.
A.spend B. spent C.gave
Shenzhou5 _______ into space with Yang Liwei.
A. fly B. flew C. fly to