Lots of trees ________in our city over the years. It is becoming greener and greener!
#44811
A
are planting
B
have planted
C
will be planted
D
have been planted
推荐题目
My uncle said he  __________for Shanghai the next day .
#44744
A
will leave
B
is leaving
C
would leave
D
leaves
 Personal computers ______ in 1976. It has changed the whole world.
#44711
A
have invented
B
were invented
C
is invented
D
invented
--Are you often          on vacation?   -- Not always.
#44642
A
relax
B
relaxing
C
relaxed
D
to relax
-  When should I hand in my paper?— Your paper must  _   as soon as the bell_   .
#44944
A
hand in; rings
B
hand in; will ring
C
be handed in; will ring
D
be handed in: rings
About seventy percent of the earth         with water.
#44524
A
is covering
B
is covered
C
are covering
D
are covered