She spoke very confidently because she wanted to make a great___________ on her employer．
| A．influence | B．pressure | C．impression | D．effect |
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 |
In their country August 31st is a national holiday,________ everybody dances in the streets.
| A．which | B．as | C．when | D．because |