Modern science has given clear evidence ______ smoking can lead to many diseases.
A. what B which C. that D where
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 |
. It looks ______ you are ill. You should go to see the doctor.
| A．as | B．as though | C．as well | D．even though |