1 . Lawrence Craven is the author of several published reports, one of _____ introduced the idea _____ aspirin could reduce the risk of heart attacks.

A．them; when	B．which; that
C．what; that	D．which; when

2 . The owner of the cinema needed to make a lot of improvements and employ more people to keep it running，________meant spending tens of thousands of pounds.

A．who	B．that
C．as	D．which

3 . Don’t take up other people’s personal space, ______ will bring much inconvenience to them.

A．where

B．which

C．what

D．that

4 . Advertising can influence consumers' moods，_____ in turn，can influence consumers’reactions to products．

A．that

B．which

C．where

D．when