. A clean environment can help the city bid for the Olympics, ________ in turn will promote its economic development.
I have ______ many different friends ______ it is hard to choose just one best friend.
I would really appreciate ______ if you can make time in your schedules to attend my lecture today.
---Do you know the person our headmaster is talking to.---Yes. I made his _______ at a party.
The old like getting up early in summer. The morning air is so good _________.
They requested that John _________ for the interview before 7 o’clock.