選用恰當(dāng)?shù)慕樵~填空。
in, on, at, towards, to
1. The woman is running ____________ the bus stop.
2. The students listen ____________ the teacher carefully.
3. I often get up ____________ six ____________ the morning.
4. There is a big boat ____________ the river.
1. towards  2. to  3. at, in  4. in
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