When he was alive, the old scientist used to say that knowledge ＿＿from practice and he gained his experience by doing a lot of practical work.
| A．was coming | B．had come | C．comes | D．would come |
Listening to loud music at rock concerts ____ caused hearing loss in some teenagers.
| A．is | B．are | C．has | D．have |
---- What has made him look like lacking sleep?
----- _____ his wife is ill and he has to get up several times a night to attend to her.
| A．For | B．Because | C．That | D．What |
If the way _____ you think of is not good enough, you can learn the way ______the top students deal with their study.
| A．in which; / | B．which; which |
| C．that; which | D．/; / |
By the time I got to the office, the meeting ______.
| A．had begun | B．began |
| C．was beginning | D．would begin |
_______ David says sounds right to Helen. That’s why she has made up her mind to live with him____ happens.
| A．Whatever; whatever |
| B．No matter what; whatever |
| C．No matter what; No matter what |
| D．Whatever; however |