there a ____ to the time that I canstay here — Yes, you must leave here before he comesback.

We need a man full of wisdom to take charge of the project.–________ the young man graduating from Harvard have a try?

What’s your plan for this winter vacation?—I’ll take an express train to Dalian for my holiday ______ school ends[ ]

He made up his mind to devote his life_______ pollution_______ happily.

One can’t only________ himself and his family.—I agree. If so, others won’t think about you.