（1）用宾语从句改写句子
问题描述：
（1）用宾语从句改写句子
Shall I buy that robot?She wasn't sure.( ）
（2）同义句改写
I don't know why he needs so much money.
I don't know ( ) he needs so much money( )
Some dinosaurs were as small as chickens,( )some were about 90 feet long.
A、when B、however C、as D、while
答
（1）She wasn't sure if she should buy that robot . if有是否之意 她不确定是否要买那个机器人
（2）I don't know (what) he needs so much money(for ),what for =why
(3)D. while 在这里表示对比,一些怎么样,而另一些又怎么样