About seventy percent of the earth         with water.
#44524
A
is covering
B
is covered
C
are covering
D
are covered
推荐题目
If the question_________ incorrectly,_________question will be given to you.
#45060
A
is answered;other
B
answers; other
C
is answered; another
D
answers; another
A lot of trees ______ on the hill yesterday.
#44945
A
are planted
B
will be planted
C
have been planted
D
were planted
Stamps ______ sending letters.
#45020
A
used to
B
are used to
C
are used for
D
are using