What are you doing? Don't you know it is ________ to read people's private letters without permission?
A. aggressive B. illegal C. reasonable D. secure
Smoking in places where it is not allowed is an example of bad ____________.
A. habits B. activities C. manners D. movements
If the car you rent is not satisfactory, you can always ________ it for another.
A. charge B. exchange C. select D. advertise
The manager's demand was that the data ____________ e-mailed to Mr. Andrew without delay.
A. should be B. would be C. were D. had been
－When I first got to Harvard, my terrible English was a burden to me.
－Oh, dear, it ________ a struggle for you to keep up with other students.
A. might be B. can be
C. should have been D. must have been
It would be a big surprise to Charles if he ____________ the good news that he has won the scholarship.
A. know B. knows C. knew D. had known
