We were told not to touch the equipment in the laboratory unless .
A. allowed to do B. allowing to do
C. allowed to D. allowing to
It is the educational system, rather than the teachers, _______ is to blame for the students’ heavy burden nowadays.
A. who B. this C. that D. whom
---- Did he come back early last night?
---- Yes. It was not yet eight o’clock _______ he arrived home.
A. when B. that C. before D. until
After a few days together, they got to the point _______ they could read each other’s thought.
A. which B. that C. where D. when
All the settlers nearby demanded that the nightclub _______ away as soon as possible because of the loud noise at night.
A. must be moved B. might be moved
C. should move D. be moved
Five years later, he returned home, his character greatly _________.
A. changed B. changing
C. having changed D. was changed
