___ she is worried about is the result of the investigation.
A.what
B.that     
C.how
D.why

I had to drive to the factory to pick up my brother, ­­­___ car wouldn’t start.
A.whose
B.who
C.who’s
D.who his

The fact ___ he is an honest man  is known to everybody.
A.who    
B.what   
C.that
D.which

The skill ___ he played the difficult piano piece was really impressive.
A.which
B.that
C.with that
D.with which

He was unwilling to explain the reason ___ his absence.
A.that     
B.why    
C.for      
D.of

It all depends on ___ they will support us.
A.that     
B.what   
C.whether
D.whatever

Is Dr. Brown the person ___ you wish to speak?
A.that     
B.whom
C.to that
D.to whom

Even students ___ I thought to be clever could not solve the problem.
A.what   

what   
B.which
C.whose
D.whom

Many people lost their homes in the earthquake. The government needs to establish more shelters to care for those ___ have homes.
A.who doesn’t
B.which doesn’t
C.who don’t
D.which don’t

This is ___ she makes vegetable curry.
A.how    
B.which
C.who
D.what