E-mail, as well as telephone, ______ an important part in daily communication.
#85906
A
is playing
B
have played
C
are playing
D
played
推荐题目
We live day by day，but in the great things the time of days and weeks ____ so small that a day is unimportant.
#86203
A
is
B
are
C
has been
D
havebeen
Over 20% of the students at that school _____ the habit of smoking, which is beyond imagination.
#85637
A
is
B
are
C
has
D
have
There ______ a number of students in our school. The number of the students ______ more than 7000.
#43664
A
is, are
B
are, is
C
is, is
D
are, are
--What is that on the table? --Oh, a set of ___________ on the table.
#43644
A
key is
B
keys are
C
keys is
D
key are