What do you think of English？
I think English is as_________as Chinese． （ ）
A．usefulB．more useful
C．the most useful
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
Anita spoke _________ quietly that I could hardly hear her．（ ）
A．tooB．suchC．soD．very