1 . We saw a new play at the theatre, ______________ we had supper at a restaurant.

A．after which

B．which after

C．then which

D．and that after

2 . The children,　 　had played the whole day long,were worn out.

A．all of what	B．all of which
C．all of them	D．all of whom

3 . Lawrence Craven, a doctor from the USA, is the author of several published reports, one of ________ introduced the idea in 1953 _________ aspirin could reduce the risk of heart attacks.

A．them; when

B．which; that

C．what; that

D．which; when