—Amazing! You wear slippers at work.
—Don’t you know it’s a fashion?
| A．must | B．should | C．can | D．may |
----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 |
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 |
______, the concert began.
| A．The listeners having taken their seats | B．Having taken their seats |
| C．Having taken their places | D．Taking their seats |
---- 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 |
---- There is a lot of smoke coming out of the teaching-building there.
---- Really? It _____ be a fire, most probably.
| A．can | B．ought to | C．have to | D．must |