Every possible means _____ to prevent the air pollution, but the sky is still not clear.
#85634
A
is used
B
are used
C
has been used
D
have been used
推荐题目
---- _________you or he the teacher of English? ----Neither my sister nor my mother _________present at the meeting.
#86159
A
Are; is
B
Is; are
C
Are; are
D
Is; is
A survey of the opinions of experts___that three hours of outdoor exercise a week___good for one’s health.
#86099
A
show;are
B
shows;is
C
show;is
D
shows;are
The number of the students in our school ____ rising since 2006.
#85809
A
is
B
has been
C
are
D
have been
Large quantities of time ______ for practising guided writings.
#85977
A
was needed
B
are needed
C
needs
D
is needed