33.I don’t think_____________difficult fora Chinese student to master a foreign language within five years34.

What do you think of the environment in our city— I am sure it _________ greatly through our work in the near future.

We made it possible the task would be finished ahead of time within three weeks

I’d like some _______ and _______.

affic slowed down because of theheavy snow in Yushu county, presenting a new __________ to the recovery fromthe earthquake