21. Young people spend most of their time _________, for they don’t want to stay at home all day.
|
A. outdoor
|
B. outdoors
|
C. indoor
|
D. indoors
|
22. The number of the teacher invited _____ twelve, but a number of them ___ late for different reasons.
|
A. were; was
|
B. was; was
|
C. was; were
|
D. were; were
|
23. Jim didn’t realize his little sister was crying _____ what he had said.
|
A. because
|
B. because of
|
C. as
|
D. since
|
