All passengers ________ go through safety check before they take a plane.
A. can B. may C. must D. ought
My father didn’t give up smoking _______ the doctor told him to do so.
A. but B. when C. until D. after
Nowadays even the flats in small towns are much ________ than they used to be.
A. expensive B. more expensive
C. most expensive D. the most expensive
---________ has your English teacher been to England?
---Three times.
A. How often B. How soon
C. How long D.How many times
The APEC meeting was held ______ November , 2014.
A. on B. in C. at D. for
Kitty is such ________ honest student that she never tells a lie at any time.
A. a B. an C. the D. /
