从B栏中找出A栏的答句，将其序号填入题前括号内
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
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