—How long in Qingdao for the Spring Festival, Mr. Li?
—I don’t know. It all depends.
| A．have you stayed | B．do you stay |
| C．are you staying | D．would you stay |
He could have helped us, but he ____ from coming in time by a traffic jam.
| A．has been prevented | B．had been prevented |
| C．is prevented | D．was prevented |
____ the rain falling so hard, it becomes more and more difficult to carry on the rescue work.
| A．Since | B．With | C．As | D．For |
The class _____ 80 students is hard to manage.
| A．making up of | B．consisted of |
| C．consisting of | D．made up |
----Who do you think should answer for Li Tianyi’s behavior?
----Actually, I think it is their parents _____.
| A．who are blamed | B．that are to blame |
| C．which are to blame | D．what are blamed |
If you are in a warmer place and can get your skin _____ to the sun for 20 minutes per day, you will need less vitamin D.
A. exposingB. being exposed
C. been exposed D. exposed