If you _____ carefully, the accident would have happened.
A.drive
B.will drive
C.had driven
D.drove

If you don’t stop talking, you _____ understand the lesson.
A.will
B.would have
C.won’t
D.wouldn’t

If I had enough free time, I _____ help my mother with housework.
A.could have
B.would have
C.could
D.can

She asked me "What would he do if he were a king?"
A.She asked me what he would do if he was a king.
B.She asked me what I would do if I were a king.
C.She asked me what he would do if he were a king.
D.She asked me what would he do if he were a king.

Choose the word whose underlined part is pronounced differently.
A.explosion
B.resource
C.expert
D.eligion

Choose the word whose underlined part is pronounced differently.
A.petroleum
B.quarrel
C.generation
D.implement

Choose the word whose underlined part is pronounced differently.
A.among
B.amount
C.aware
D.average

Choose the word whose underlined part is pronounced differently.
A.petroleum
B.explosion
C.control
D.iron

Choose the word whose underlined part is pronounced differently.
A.pub
B.insurance
C.support
D.punishment

He has ______ extensive research into renewable energy sources.
A.carried out
B.cared for
C.turned on
D.taken over