Nowadays, some people are suffering from Ebola, which if not , will threaten their lives.
| A．having treated properly | B．to treat properly |
| C．properly treating | D．properly treated |
No matter how bright a talker you are, there are times when it’s better ______ silent.
| A．remain | B．be remaining | C．to remain | D．having remained |
We laugh at jokes, but seldom __________ about how they work.
| A．we think | B．think we | C．we do think | D．do we think |
There is ___________ as a free lunch.
| A．not such thing | B．no such a thing | C．no such thing | D．such no thing |
He works as an engineer now, but he _____ on a farm for three years.
| A．has worked | B．worked | C．was working | D．had worked |
Wu Juping, ______ the most beautiful mother, is also popular with foreigners for her saving the baby _________ off the high building.
| A．honored; falling | B．honoring; falling | C．honored; fallen | D．honoring; fallen |