2.we must____the rubbish into the bin to keep the classroom clean.添空

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2.we must____the rubbish into the bin to keep the classroom clean.添空

2.we must____the rubbish into the bin to keep the classroom clean.添空
2.we must____the rubbish into the bin to keep the classroom clean.
添空

2.we must____the rubbish into the bin to keep the classroom clean.添空
.we must throw the rubbish into the bin to keep the classroom clean.
我门必须把垃圾仍到垃圾箱里并保持教室干净
仍用throw