We hadn't met for 20 years, but I recognized her_____ I saw her.
| A．the moment | B．for the moment |
| C．the moment when | D．at the moment when |
Mr Brown is a(n) _____ secretary in our office, for he is able to do tasks successfully, without wasting time and energy.
| A．effective | B．efficient | C．flexible | D．sufficient |
_____ of the good results of the exam, the teacher felt very happy.
| A．informed | B．told |
| C．acknowledged | D．convinced |
It will be a while_____ the real-estate problems _____ are the root cause of the price rises are solved.
| A．since, which | B．after, which |
| C．before, that | D．when, that |
It’s those _____ experience ups and downs with us_____ are real friends.
| A．that, that | B．who, that |
| C．that, which | D．that, who |
You can only get out of something ______ you put into it.
| A．which | B．that | C．what | D．when |