His name is on the _______ of my tongue, but I just couldn’t remember it.
| A．tip | B．top | C．side | D．end |
The medicine works more effectively ________ you drink some hot water after taking it.
| A．as | B．until | C．although | D．if |
Owen wouldn't eat anything ________ he cooked it himself.
| A．until | B．since | C．unless | D．while |
You will be successful in the interview ________ you have confidence.
| A．before | B．once | C．until | D．though |
People who are really in need of houses will suffer heavy losses ________ the government takes measures to bring down house prices.
| A．if | B．in case | C．unless | D．since |
________ hard one may work, one cannot master a foreign language in a month or two.
| A．Whenever | B．Wherever |
| C．Whatever | D．However |