1 . In this way, practicing day in and day out helped Stephen s ________（磨练）his skills. （根据中英文提示填空）

3 . Do you know who our teacher will have ______ an article for the newspaper?

A．written

B．wrote

C．to write

D．write

4 . I prefer to have those advanced machines ________ rather than let them ________ by the enemies!

A．destroyed…used	B．to be destroyed…be used
C．destroyed…be used	D．to be destroyed…used

5 . In 2007, an American TV team made copies of Yeti tracks, which measures 33 centimetres in length, and they had a scientist in the USA ________ them.

A．to examine	B．examined
C．examining	D．examine