Happy birthday , Alice ! So you have      twenty-one already !

Would you  ____  help me?

.---You have just 15 minutes to get to the airport.
---All right. I guess I can ______.

.I think you need some outdoor exercise. Plenty of fresh air will______ good health.

Don't bother Tom, he is________with the experiment on water molecules in the lab.

Though suffering a serious injury, Rafael Nadal refused to _______ the game and went on.

Though suffering constant noise from the outside world, little Tommy was still working with all his
attention _____ on his unfinished warship model.

. The school has recently decided that students aren’t permitted to use mobile phones at school, but I find it difficult to _______ this decision..

Don’t panic; just _________ that rock and I’ll come and fetch you down.

It’s well known that good relationship between two countries __________ the development of mutual culture and economy.