30 % of the young trees, attacked by diseases, ________pine trees.
#103690
A
is
B
are
C
was
D
has been
推荐题目
I ________ with my grandma because my parents have gone abroad for further study.
#100778
A
stayed
B
am staying
C
have stayed
D
was staying
. Why _____ so many money recently? I am bored to see you.
#103814
A
are you borrowing
B
have you been borrowing
C
have you borrowed
D
did you borrow