This isapple and that ispear.A. an；a B. a；an C. an；an
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
Why are you wearing a hat? -- it’s hot.A. So B. Because C. But
Let’s go . A. swimming B. swims C. swimming
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