–Whose is this purple scarf?
–It _______ be Mary’s. She always wears a purple scarf like this.
A. must B. can
C. mustn’t D. can't
Please _______ spend too much time playing computer games. It wastes a lot of time.
A. not B. aren’t
C. don’t D. not to
–Victor, could you please speak more _______ so that everyone can understand you?
–OK.
A. heavily B. widely C. hardly D. slowly
It’s not easy to learn a foreign language, but I will never _______.
A. put on B. turn off
C. give up D. try out
My classmates and I are working much _______ than before, because we’ll take an important exam soon.
A. hard B. harder
C. hardest D. the hardest
–Would you like some more chicken soup?
–Yes. It _______ really nice.
A. looks B. feels C. sounds D. tastes
