Nowadays, people like to discuss if young couples need ______ second child.

The student’s behavior cost the teacher asteepless night . He never thought his student ______ computer games for awhole class .

Whatever we have achieved, we should always _____ against pride.[ ]

During the APEC summit（峰会)，Beijing’s sky was so blue and clear.－It APEC blue.But too bad it no longer stays that way．

If Tom doesn’t go to the party tomorrow, ______________.