The government has taken some measures to solve the shortage of water, but it may be some time __ the situation improves.
| A．since | B．when. |
| C．unless. | D．before. |
Love is_____ makes you smile when you are tired.
| A．that | B．what |
| C．it | D．which |
It is difficult for us to imagine_____ life was like for slaves in the ancient world.
| A．where | B．what |
| C．which | D．why |
I now, we have raised 50.000 pounds for the poor children, ______ is quite unexpected.
| A．that | B．which |
| C．who | D．it |
--- Is it true that Mike refused an offer from Yale University yesterday?
--- Yeah, but I have no idea _______ he did it; that’s one of his favorite universities.
| A．when | B．why |
| C．that | D．how |
We’ll reach the sales targets in a month _______ we set at the beginning of the year.
| A．which | B．where |
| C．when | D．what |