The young couple, who returned my lost wallet, left _______ I could ask for their names.
| A．while | B．before |
| C．after | D．since |
A proposal has been put forward at a recent video conference _______ measures be taken to raise the citizens’ awareness of traffic safety.
| A．that | B．as |
| C．when | D．which |
I find that looking after children is a fun and challenging job ___________ you need to be patient and careful．
| A．That | B．which |
| C．where | D．when |
There are many new central leaders in China now, ________ many once worked in the western provinces.
| A．in which | B．of whom |
| C．in whom | D．for whom |
Some passers-by witnessed the car accident ______ five passengers were killed.
| A．where | B．which |
| C．that | D．when |
John returned with two workers, with_______ help we finally got the car out of the mud.
| A．whose | B．their |
| C．which | D．that |