–Do you know the boy ___ is standing under the tree?-Yes, he is my friend, Peter.
#43123
A
what
B
who
C
whom
D
whose
推荐题目
—What does “plumber” mean, Alice?—It means a person fixes sinks and toilets.
#42556
A
which
B
who
C
what
D
whom
---Do you know Mr. Smith? ---Yes. He is the man _______ has short black hair.
#43102
A
which
B
why
C
who
D
when
