1 . No other countries could ________, nor could slaves ________ women.

A．join; or

B．join in; or

C．join; and

D．join in; and

2 . How can you expect him to make any progress _____ you never give him a chance to have a try?

A．when	B．unless
C．even though	D．until

3 . ____ he had not hurt his leg, John would have won the race.

A．If

B．Since

C．Though

D．When