Never stop doing ___________you are fond of.
| A．no matter what | B．whatever | C．if | D．that |
They _________ the habit of visiting old friends,_________ I think is great.
| A．keep on;which | B．keep up;which |
| C．keep on;as | D．keep up;as |
This is the main use that the scientists make _________ of natural resources.
| A．it | B．which | C．use | D．/ |
Fire safety in family houses,_______ most fire deaths occur,is different to achieve.
| A．where | B．which | C．to which | D．from what |
She looks forward every spring to _________ the flower-lined garden.
| A．visit | B．paying visit | C．walk in | D．walking in |
There was a big argument among the children about _________ move to a new house.
| A．if they should | B．that they ought |
| C．if should they | D．whether they should |