The boy is hiding__a tree.(on,behind)为什么不能用on?
The boy is hiding__a tree.(on,behind)为什么不能用on?
1.The boy is hiding ___ (on,behind) a tree.为什么不能用on?
2.There is a garden ___ (behind,between) the house.为什么不能用between?
3.Look!The children are ___ (across,on) the bridge.为什么不能用across?
4.There is a box ___ (over,on)the table.为什么不能用over?
5.There are two policemen ___ (before,in front of) that building.为什么不能用before?
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