I won’t give my help ______ you will tell me the truth.
| A．unless | B．since | C．if | D．even though |
It is said that his health ______ by years of hard working.
| A．has been destroyed | B．has destroyed | C．is destroying | D．had been destroyed |
Does everyone know what to do if a fire ______?
| A．is broken up | B．breaks up | C．is broken out | D．breaks out |
It is obvious _________ he has known the news and he is very satisfied with the result.
| A．which | B．that | C．what | D．whether |
We _______ in the office.
| A．are not permitted smoke | B．are not permitted smoking |
| C．don’t permit smoking | D．don’t permit to smoke |
I’ll help you _______ I don’t sleep for night.
| A．though | B．although | C．even if | D．as if |