_____ is even more important is that as the earth cooled down, water began to appear on its surface.
| A．As | B．That | C．What | D．Where |
The computer system __________ suddenly while he was searching for information on the Internet.
| A．broke down | B．broke out |
| C．broke up | D．broke in |
Someone is ringing the doorbell . Go and see ______?
| A．who is he | B．who he is |
| C．who is it | D．who it is |
_______ from what he said and did , Mr White is a doctor.
| A．Judge | B．Judged |
| C．Judging | D．Being judged |
Early to bed and early to rise ______ a man healthy, happy and wise.
| A．making | B．to make | C．make | D．makes |
---Let’s go for an outing this weekend .
--- __________.
| A．I’m very glad | B．I’ll be happy |
| C．Why not | D．I would very much like |