高一层次的土地利用总体规划是下一级土地利用总体规划的依据。

根据句意，用括号中所给单词的正确形式填空。

小题1:All the homeless children               (look) after well.

小题2:I’m not               (certainly) whether I can do it.

小题3:We have decided not to go, though it was difficult               (decide).

小题4:I’ve two               (knife). I use them to cut watermelons.

小题5:When I visited them last night, they               (chat) by the fire.