Right now the writer and manager _____ busy preparing for the following meeting.
| A．is | B．Are |
| C．was | D．were |
Had the government limited the sales of cars much earlier, traffic jam and pollution _______so serious now．
| A．has not been | B．would not be |
| C．had not been | D．wouldn't have been |
____today, he would get there by Friday.
| A．Would he leave | B．Was he leaving |
| C．Were he to leave | D．If he leave |
Had they known what was coming next, they _________second thoughts.
| A．may have | B．could have |
| C．must have had | D．might have had |
Had you taken it more seriously, you ________ such a silly mistake.
| A．may not make | B．couldn’t make |
| C．mustn’t have made | D．wouldn’t have made |
_________, the world would be more harmonious.
| A．Weren't there any wars |
| B．There weren't any wars |
| C．Were there no wars |
| D．Had there no wars |