1.She could not think of a good idea.
问题描述：
1.She could not think of a good idea.
She( )( )( )think of a good idea.
2.It seemed that he was very sad when he heard the news.
He( )( )( )very sad when he heard the news.
3.He was happy that they made him the host.
He was happy( )( )( )the host.
4.He did not stop trying until he got when he wanted.
He( )( )until he got when he wanted.
答
1.wasn't able to
2.seemed to be
3.to be made
4.kept trying