Helen _______her keys in the office so she had to wait until her husband ___home.
| A．has left; comes | B．left, had come | C．had left; came | D．had left; would come |
In our class, about ______ of the students ____ girls.
A. third fifth, are
B. third fifths, is
C. three fifths, are
____Lucy ____Lily knows French, so I have to ask a third person for help.
A. Neither; nor
B. Not only; but also
C. Either; or
People were advised _____ in the river because it is very deep.
A. not to swim
B. not swimming
C. to not swim
Michael’s father wants to ____ the best education in the country______ his son.
A. provide, with
B. provide, for
C. provide, to
John didn’t know ____ the medicine.
A. what to take
B. how to take
C. where to eat