We welcome rain, but a（an）_______ large amount of rainfall will cause floods.
| A．eventually | B．extremely | C．gradually | D．constantly |
_____ he realized it was too late to return home.
| A．No sooner it grew dark than | B．Hardly did it grow dark when |
| C．It was not until dark that | D．It was until dark that |
So little _____ agree on the plan that they could not settle their difference.
| A．did they | B．do they | C．they did | D．they did not |
We were lucky enough， for no sooner _____ home _____ it rained.
| A．we returned， and | B．we had returned， when |
| C．did we return， when | D．had we returned， than |
____， 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 |