Mr. Wang found some newspapers on the ground, and he ______.
| A．picked them up | B．picked it up |
| C．picked up it | D．picked up them |
—Ring me up ________ you come to my house, will you?
—Sure, I will.
| A．though | B．while | C．before | D．until |
You will fail the exam ________ you work hard.
| A．unless | B．once | C．since | D．after |
Zhou Libo is Shanghai's favorite funny man. He is good at making people laugh. His lively shows were ________ hot that tickets were sold out in minutes.
| A．very | B．too | C．such | D．so |
I really enjoyed your speech，________ there were some parts I didn't quite understand.
| A．because | B．for | C．until | D．though |
I enjoy fresh air so I always let the window open ________ it is really cold.
| A．unless | B．when | C．if | D．since |