All the passengers _______ go through the safety check before getting on the plane.
A. might B. must C. can
There are so many foggy days these days. We all want to know ___________.
A. what can we do to prevent it
B. how to prevent it
C. we can do anything to prevent it
______ Lily ______ Lucy is going with you, because one of them must stay at home.
A. Not only; but also
B. Neither; nor
C. Either; or
Look! That’s Mark. He has been teaching ________ English for two years.
A. our B. us C. we
It is a pity that we have to __________ the school trip because of the rainy days.
A. set off B. go off C. put off
--- Why is Jerry studying so hard these days?
--- __________ a better high school.
A. Entering B. To enter C. Enter
