I was born _______ the morning _______ February 25th, 1997. [ ]

Who’s the woman in red ? Is it Mrs. White?—It be her. She went to Beijing yesterday.

So far we have done a lot to build a low-carbon economy, yet it is still _________ ideal. We have to work even harder.

It was nearly an hour ____the sleeping pill ______effect.

Listen! Is Mary singing in the next room?—No. It _______ be Mary．She has gone to Shanghai for an important meeting.