------ How’s your tour around the North Lake? Is it beautiful?
------ It _______ be, but it is now heavily polluted.
| A．will | B．should | C．would | D．must |
5.Is ____ necessary to complete the design before National Day?
| A．this | B．that | C．it | D．he |
6.I don’t think ____ possible to master a foreign language without much memory work.
| A．this | B．that | C．its | D．it |
7.Does ______ matter if he can’t finish the job on time?
| A．this | B．that | C．he | D．it |
8.I was disappointed with the film . I had expected ______ to be much better.
| A．that | B．this | C．one | D．it |
9. The doctor advised Vera strongly that she should take a holiday, but _______ didn’t help.
| A．it | B．she | C．which | D．He |