Without facts, a person can not form a correct opinion, for he needs to have actual knowledge ______his thinking .
| A．on which to be based | B．on which to base |
| C．which to be based | D．which to base |
Among the problems is _____ they often failed to take into account that those people are more likely to use sunscreen.
| A．that | B．what | C．when | D．where |
—I dare say you will definitely miss your flight if you don’t hurry.
—Oh, _____. It’s almost the time.
| A．so will I | B．I do so | C．so I will | D．so will you |
Had it not been for the fact that I _____ absent, I would have asked you to do this right now.
| A．had been | B．were | C．should be | D．was |
_____ a girl’s brain is better organized to send and receive speech, we generally talk to them more.
| A．Although | B．Since | C．For | D．When |
This morning Ms. Green entered our classroom, and _____ us something important about the coming exam, left.
| A．having told | B．told | C．telling | D．to tell |