1 . When asked why he went there, he said he was sent there _____for a space flight.

A．training

B．being trained

C．to have trained

D．to be trained

2 . The air is nice _______.

A．breathe	B．breathed
C．breathing	D．to breathe

3 . What we should be thinking about now is how to make up for the lost time, not who is _______.

A．blaming	B．blamed
C．to be blamed	D．to blame

4 . —Mr. Smith, do you have something ________ at this moment?
—No, thanks. I’ll call you if any.

A．to be typed	B．to type
C．typed	D．typing

5 . The question of _________ English will keep on changing in the future, though most people doubt, is actually easy________.

A．if; to be answered	B．whether; to answer
C．how; answered	D．what; to answer

6 . _______the virtual world of Real Cine, the headsets even have small openings _______ smells to match the environment.

A．Adding to; give out	B．Added to; give off
C．To be added to; giving off	D．To add to; giving out

7 . Most of the people ________ to the party tomorrow are famous scientists.

A．inviting

B．invited

C．invite

D．to be invited

8 . The text is too difficult. The explanation of our teacher will help make it easy ________.

A．to understand	B．to be understood
C．understood	D．understanding

9 . Since the baby milk powder was found to be polluted, there has been universal doubt _____ other food products are safe _____.

A．that; to eat	B．whether; to be eaten
C．whether; to eat	D．that; to be eaten

10 . The pollution is getting worse and worse; we must stop pollution ______ a better life.

A．to live	B．from living
C．living	D．live