1 . To improve the quality of our products, we asked for suggestions _____ had used the products.

A．who	B．whoever
C．whichever	D．which

2 . The small mountain village       we spent our holiday last month lies in        is now part of Hubei.

A．which; where

B．where; what

C．that; which

D．when; which

3 . Zheng He’s first stop during the expedition was in _______ is a part of Vietnam today.

A．where

B．what

C．which

D．that

4 . 13. Our bad living habits will destroy the earth. Only by changing ________we live can we save the earth.

A．that	B．what
C．how	D．where