—Shall we go and have a picnic at the weekend?
—__________.The weather forecasts say there might be a cold front by then.
| A．Why not | B．We can wait | C．No,let’s not | D．It depends |
In the competition to be held, a gold medal, together with a certain sum of money, _________ the champion.
| A．will be given to anyone who will win |
| B．will be given to whoever will become |
| C．has been given to whoever wins |
| D．was given to anyone who became |
You will have to wait for one more week, _________ the manager will be back from his trip.
| A．when | B．before | C．as | D．until |
_________ environmental damage is done, it takes many years for the ecosystem to recover.
| A．Even if | B．If only | C．While | D．Once |
After he became conscious, he remembered _________ and _________ on the head with a rod.
| A．to attack; hit | B．to be attacked; to be hit |
| C．attacking; be hit | D．having been attacked; hit |
Human facial expressions differ from those of animals in the degree _________ they can be controlled on purpose.
| A．with which | B．of which | C．to which | D．for which |