If the weather had been better，we could have had a picnic．But it all day．
| A．rained | B．rains | C．has rained | D．is raining |
On hearing the bad news, he got up quickly ______ the lunch unfinished.
| A．leaving | B．left | C．to leave | D．leave |
The girl looked at me with a _______expression. Maybe the problem was quite ______.
| A．puzzled; puzzling | B．puzzling; puzzled |
| C．puzzled; puzzled | D．puzzling; puzzling |
Would you please ______ your statement again? I don’t understand what you were saying.
| A．classify | B．clear | C．clarify | D．charity |
---How long has the United Nations ________?
--- ______1945.
| A．come into existence; In | B．been in existence; Since |
| C．been in existence; From | D．come into existence; For |
Dr. Black is a professor of chemistry. _______, he is a famous writer.
| A．In all | B．In brief | C．In fact | D．In addition |