--How can I make progress in my study, Sir?
--_______ an effective leaner, you should find some good approaches.
| A．Being | B．Having been |
| C．To have been | D．To be. |
________ all of them are strong candidates，only one will be chosen for the post.
(2011·陕西，19)
| A．Since | B．While |
| C．If | D．As |
Please call my secretary to arrange a meeting this afternoon，or________it is convenient to you. (2011·江西，29)
| A．whenever | B．however |
| C．whichever | D．wherever |
Jack wasn’t saying anything，but the teacher smiled at him________he had done something very clever. (2011·湖南，33)
| A．as if | B．in case |
| C．while | D．though |
At school，some students are active ________ some are shy，yet they can be good friends with one another. (2012·四川，4)
| A．while | B．although |
| C．so | D．as |
I had hardly got to the office________my wife phoned me to go back home at once.
(2012·大纲全国Ⅱ，11)
| A．when | B．than |
| C．until | D．after |