250. Every year Harvard University awards to excellent foreign students in theoretical physics.
| A．bonus | B．scholarships | C．rewards | D．Pensions |
If you don’t wait _______ the red light, you will be punished by the policeman.
| A．at | B．under | C．for | D．on |
---- You shouldn’t have gone there alone last night.
---- But I ______, because Xiao Wang went there, too.
| A．didn’t | B．had to | C．did | D．should |
______, the concert began.
| A．The listeners having taken their seats | B．Having taken their seats |
| C．Having taken their places | D．Taking their seats |
He has got himself into a dangerous situation ______ he is likely to lose control over the plan.
| A．where | B．which | C．where | D．why |
----Now that you like the computer so much. Why not buy it?
---Well, I can’t afford ______computer.
| A．that expensive a | B．a that expensive | C． that an expensive | D．an expensive that |