—How long do you think it is ________ he arrived here?
—No more than half a year, I believe.
| A．when | B．that | C．before | D．since |
____， he would have passed the exam.
| A．If he were to study | B．If he studied hard |
| C．Had he studied hard | D．Should he study hard |
Little wonder _____ up their hands in dismay.
| A．have some thrown | B．some have thrown | C．thrown some have | D．have thrown some |
No sooner ____ they rushed out into the street.
| A．did they hear the news than | B．did they hear the news when |
| C．had they heard the news than | D．had they heard the news when |
So carelessly _____ that he almost killed himself.
| A．he drives | B．does he drive | C．did he drive | D．he drove |
—— You ought to have given them some advice
---- _____, but who cared what I asked?
| A．So ought you | B．So 1 ought | C．So it was | D．So I did |