1 . In any unsafe situation, simply ________ the button and a highly-trained agent will get you the help you need.

A．press	B．to press
C．pressing	D．pressed

2 . _____ the plant once a week if you are to get fruit in the autumn.

A．Watered

B．Watering

C．To water

D．Water

3 . Before you hand in your final report, ________ there are no spelling mistakes.

A．make sure	B．to make sure
C．made sure	D．making sure

4 . ______ smiling and one day life will get tired of upsetting you.

A．To keep

B．Keeping

C．Keep

D．Having kept

5 . _______ me when you get it through and I’ll pick you up at your work place.

A．Calling

B．Call

C．Called

D．To call

6 . _______ here if you want to get a better view of the mountain scenery.

A．To come

B．Coming

C．Comes

D．Come

7 . Put yourself in situations where you're forced to communicate in English, ______ you'll see more progress over time．

A．until

B．or

C．but

D．and