The field research will take Joan and Paul about five months; it will be a long time _____ we meet them again.
| A．after | B．before | C．since | D．when |
The temple is carved in rocks and has on the outside four large stone statues, ______ is 20 metres high.
| A．each of them | B．which | C．and each of that | D．each of which |
It was an exciting moment for the football fans, ______for the first time in years their team won the World Cup..
| A．which | B．that | C．when | D．where |
It was a serious mistake, ______ caused by carelessness.
| A．which I think was | B．which I think it was |
| C．I think which was | D．that I think it was |
____ is known to everybody, the moon travels round the earth once every month.
| A．it | B．As | C．That | D．What |
I remember that _____ took part in the ball party had a wonderful time.
| A．all | B．all that | C．all which | D．all what |