填 it useful
知识点延伸:
find / think / feel /suppose / believe +that +it +is / was+adj+to do sth=find / think / feel /suppose / believe it +adj+to do sth ,前者是宾语从句,后者是简单句.
填 it useful
知识点延伸:
find / think / feel /suppose / believe +that +it +is / was+adj+to do sth=find / think / feel /suppose / believe it +adj+to do sth ,前者是宾语从句,后者是简单句.