19. I don’t want to see him. His ______ to me is always rather cold.
| A．opinion | B．behavior | C．action | D．Attitude |
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 |
—Coach，can I continue with the training?
—Sorry，you can’t________you haven’t recovered from the knee injury.(2012·重庆，30)
| A．until | B．before |
| C．as | D．unless |