every week he takes___exercise on the playground.A.two hour's B.two hours' C.two hour D.a two-hour

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every week he takes___exercise on the playground.A.two hour's B.two hours' C.two hour D.a two-hour

every week he takes___exercise on the playground.A.two hour's B.two hours' C.two hour D.a two-hour
every week he takes___exercise on the playground.A.two hour's B.two hours' C.two hour D.a two-hour

every week he takes___exercise on the playground.A.two hour's B.two hours' C.two hour D.a two-hour
答案:B two hours' exercise 两个小时的锻炼,这里要用名词的所有格形式.

B two hours' exercise