______ happened to be no one in that house when the typhoon hit the area.
| A．It | B．There | C．This | D．That |
We are confident that the environmenr by our further efforts to reduce pollution
| A．had been improved | B．will be imroved | C．is improved | D．was improved |
To her joy,Della earned first the trust of her students and of her collegues.
| A．that | B．one | C．ones | D．those |
Lauro was away in Paris for over a week.When she got home,there was a pile of mails for her
| A．waited | B．to wait | C．waiting | D．was waiting |
Everything seemed to be going for the first two days after I arrived in New York.
| A．vividly | B．generally | C．frequently | D．smoothly |
At no time the rules of the game.It was unfair to punish them.
| A．they actually broke | B．do they actually break |
| C．did they actually break | D．they had actually broken |