28. Those who bring sunshine into the lives of others cannot keep ____ from themselves．
| A．it | B．one | C．those | D．Them |
----No one is so ____ about his joy as Doctor Li.
----You are right. He devotes all his time and energies to his cause.
| A．mad | B．wild | C．serious | D．crazy |
Hundreds of _____ of science fiction are published each year in our country.
| A．styles | B．titles | C．subjects | D．topics |
----Are you sure that he is able to do the work well?
---- _______ he could give his mind to it.
| A．In case | B．If only | C．On condition that | D．Unless |
It’s said that there are plenty of hotels in that town. There be any difficulty for you to find somewhere to stay .
| A．wouldn’t | B．mustn’t | C．shouldn’t | D．needn’t |
---You haven’t said a word about my new hair-style, Molly. Do you like it?
---I’m sorry I ______ anything about it sooner. I certainly think it’s pretty.
| A．wasn’t saying | B．don’t say | C．won’t say | D．didn’t say |