alan piays basketball ( ) three hours in the afternoon 1.on 2.for 3.in 4.of

alan piays basketball ( ) three hours in the afternoon 1.on 2.for 3.in 4.of
alan piays basketball ( ) three hours in the afternoon 1.on 2.for 3.in 4.of

alan piays basketball ( ) three hours in the afternoon 1.on 2.for 3.in 4.of
2 for.
完善下回答吧,知友们期待您耐心详细的解答

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答案：2为正确答案