—What can we do to ______ bird flu (禽流感) from spreading？
—Try not to buy or eat the chicken that has not been checked.
A. prevent B. cause
C. discover D. protect
My parents getting up early on weekdays.
A. used to B. be used to
C. was used to D. are used to
His family are worried about him because they haven’t _____ letters from him for a long time.
A. accepted B. received
C. written D. collected
It used to be very quiet and ______ ever happened around here.
A. nothing much B. much nothing
C. nothing many D. many nothing
When he saw a wallet on the ground, he ________at once.
A. picked it up B. gave it up
C. picket up it D. put it up
Where are you going this month?
We_________ go to Xiamen, but we’re not sure.
A. needn’t B. must C. might D. mustn’t
