For a moment nothing happened .Then ____ of the falling stones and soils.
| A．noises had come | B．came noises | C．noises would come | D．did noises come |
______ environmental damage is done, it takes many years for the ecosystem to recover.
| A．Even if | B．If only | C．While | D．Once |
Whenever he was asked why he was late for class, he would answer carelessly, always ______ the same thing.
A. saying B. said C. to say D, having said
The owner of the cinema needed to make a lot of improvements and employ more people to keep it running, ______ meant spending tens of thousands of pounds.
| A．who | B．that | C．as | D．which |
—It took me ten years to build up my business, and it almost killed me.
—Well, you know what they say. ______.
| A．There is no smoke without fire | B．Practice makes perfect |
| C．All roads lead to Rome | D．No pains, no gains |
Although medical science ______ control over several dangerous diseases, what worries us is that some of them are returning.
| A．achieved | B．has achieved | C．will achieve | D．had achieved |