It is clear that the whole world is passing through a social revolution in which a central _____ must be taken by scientists and technologists.
| A．process | B．attention | C．measure | D．part |
—Shall we attend the concert this evening?—Great idea, ___ we can do some shopping first.
| A．when | B．where | C．since | D．if |
—Why do English people talk so often about the weather when they start a conversation?
—Well, it’s probably because the weather is a(n)________ topic.
| A．safe | B．sensitive | C．amazing | D．ordinary |
People in Los Angels have no idea of distance on the map, so they measure distance ____ time not miles.
| A．by way of | B．by means of | C．for lack of | D．on account of |
-What attracted you to our university? -You have a great basketball team and I can ___ for it.
| A．work out | B．look out | C．carry out | D．try out |
—Mike, you’ve got a “D” in physics. ________?
—Well. I find the subject hard and I think I’ll drop it for History next term.
| A．What if | B．How come | C．Why not | D．So what |