The visiting professor         giving lectures to students         invited to meetings at times.

---- I’ll be away on a business trip. Would you mind looking after my car?  //---- Not at all.        .

The boy is very brave. I         he         the tall tree.

 I hate         when people talk with their mouths full.

--- Aren’t you ____ that Wang Kai got full marks in the English examination?

---- Yes, it is really _______.

She brought with her three friends, none of         I had ever met before.

We wonder ___________ quite a number of living things are dying out.

He was so busy that he couldn’t help ____________ the experiment.

After he ________ the golf club, he has ________ a number of competitions.

 My uncle’s house is much smaller than ours, but it is twice         expensive.