THE BOOKS COST ME TEN DOLLARS 改同义句
（1）I'm not sure what I can buy for my brother.(改同义句）
I'm not sure __ __ __for my brother.
（2）The young man is so strong that he can carry the heavy box.(改同义句）
The young man is __ __ __carry the heavy box.
（3）The picture cost me ten dollars.（改同义句）
I__ ten dollars __the picture.
（4）had us是什么意思啊
参考答案:1.I'm not sure what to buy for my brother.
2.The young man is brave enough yo carry the heavy box.
3.I spend ten dollars on the picture.
4.让我们干什么,have sb do ,had为have的过去时
是原形.但若是have sth done 使某物怎么样,用过去分词.