We share the resources of the world, ______ any action of waste can affect other people.
| A．so | B．if | C．unless | D．because |
The kind-hearted woman made _______ her duty to look after all the old people there.
| A．this | B．that | C．one | D．it |
Most of us hate people ________ talk much but do little.
| A．whom | B．whose | C．which | D．who |
The craze fans ________ outside the hall, and they will wait till the movie star comes.
| A．were waiting | B．are waiting | C．waited | D．had waited |
Her grandmother has taught in this school _______ she became a school teacher.
| A．before | B．since | C．until | D．after |
Is this the hotel ________ you stayed the first time you were here?
| A．which | B．when | C．that | D．where |