He is the authorof three books on art and many readers love his works.（ ）
| A． |
seller |
B． |
helper |
C． |
writer |
D． |
teacher |
David said that the glass was broken and warned me __________ it．（ ）
A．don't touchB．to not touch
C．not to touchD．no touching
I went to work the next day，__________ I was still feeling unwell．（ ）
A．becauseB．untilC．unlessD．though
We should save energy by _________ the lights when we leave a room．（ ）
A．getting offB．showing off
C．taking offD．turning off
The teacher encourages the children to feel _________ about asking questions when they don't understand．（ ）
A．nervousB．confidentC．excitedD．practical
I will see what I can do，but I can't ______ you anything．（ ）
A．planB．prepareC．promiseD．protect