表语从句练习
1. 可接表语从句的连系动词有           be， look ， seem， sound ， appear, remain 等。
China is no longer ________ she used to be.
  今日的中国不再是过去的中国了。
The question remains ________ they will be able to help us.
  问题还是他们能否帮我们。
At that time ， it______   _____   _______ I couldn't think of the right word.
  当时，我似乎怎么也想不出一个恰当的字眼来。
  Key   what    whether    seems as if
2. 从属连词 whether ， as (与 … 一样 )， as if / though 引导的表语从句。
He looked just ______ he had looked ten years before.
  他看起来还与十年前一样。
It _____   ____ ...