Which of the following is the main disadvantage of solar energy mentioned in the passage?
A.It is expensive.
B.Solar cells require large areas to operate.
C.It is unfriendly to the environment.
D.It depends on sunlight.

_____the salary meets my expectations, I will accept the job offer.
A.So
B.Although
C.If
D.Therefore

Despite its successful _____reforms, this country is still a developing one.
A.economizing
B.economic
C.economical
D.economics

Tom: “You’ve got a lovely singing voice, Mary!"Mary:_____
A.Thank you.
B.Don’t mention it.
C.It's all right.
D.Congratulations!

Many people _____homeless after the earthquake in Haiti a few months ago.
A.will become
B.became
C.become
D.are becoming

John: “Will you be able to come to the meeting?"Jack:_____
A.I’m afraid not
B.I’m sorry not
C.You must be kidding
D.Of course, you will

My grandmother takes_____ for keeping house.
A.ability
B.possibility
C.probability
D.responsibility

__________(9)
A.imitation
B.limitation
C.creation
D.collection

“________ you lend me your calculator for some minutes, please?"
A.Must
B.Will
C.Should
D.Need

Because of the economic crisis, many workers are now in ______of losing their jobs.
A.worry
B.warning
C.danger
D.threat