80% cotton ___ been sent to America.
A. has
B. have
C. is
D. are
查看答案
Half of the apples ___ red.
A. are
B. is
C. was
D. being
A number ofancient buildings __ destroyed in the war.
A. is
B. are
The number of the visitors __ decreased this year.
A. has
B. have
My family __ very poor when I was a little girl.
A. was
B. were
微信支付 
支付宝支付