I’m sorry you’ve been waiting so long, but it’ll still be some time ______ Smith gets back.
| A．before | B．since | C．till | D．after |
In this experiment, they are woken up several times during the night, and asked to report what they＿＿＿＿.
| A．had just been dreaming | B．are just dreaming |
| C．have just been dreaming | D．had just dreamt |
.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 |
.She ＿＿＿＿＿ to the office than she got down to writing the report.
| A．has no sooner got | B．had hardly got |
| C．no sooner got | D．had no sooner got |
He ＿＿＿articles for our wall-newspaper these three years, and he ＿＿＿about forty articles.
| A．has been writing； has written |
| B．has been writing； wrote |
| C．is writing； has been writing |
| D．has written； has written |
—— Look at the black clouds.It ＿＿＿＿＿＿ soon.
—— Sure.If only we ＿＿＿＿＿out.
| A．is raining； didn’ t come |
| B．is to rain； won’ t start |
| C．will rain； haven’ t started |
| D．is going to rain； hadn’ t come |