Every year lots of trees ____________ to make our country more beautiful.
#44817
A
is planted
B
was planted
C
are planted
D
were planted
推荐题目
Many accidents_____ by careless drivers last year. 
#44673
A
are caused
B
were caused
C
have caused
D
will cause
Ann and I   doing   homework now.
#44773
A
am ,their
B
are ,their
C
are ,our
D
am ,our