It is stupid to do that ___ it is quite unnecessary.
A.as
B.but
C. although
D.so

How old do you have to be ___ you can drive a car?
A.when
B.until    
C.before
D.since

I copied my notebook ___ he wrote on the blackboard.
A.however
B.whatever
C.that
D.whoever

I usually take sandwiches for my lunch, but ___ and then I go to a cafe.
A.now    
B.once    
C.again
D.ever

Time ___ time she was warned of the consequences of her action.
A.and
B.until    
C.after    
D.after

Jake is a very good student of languages. His brother Micheal, ___, has never been able to master another language.
A.therefore
B.by the contrast
C.on the other hand
D.whereas

The children won’t go to sleep ___ we leave a light on outside their bedroom.
A.except
B.unless
C.otherwise
D.but

My brother’s new hobby is___ foreign coins.
A.collection
B.collecting
C.collected
D.to collect

The children agreed ___ the candy equally.
A.divide
B.to divide
C.dividing
D.to dividing

The reason ____ he left was that he felt lonely.
A.which
B.what
C.why
D.how