–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
The girl____was my girlfriend.
#42563
A
you just talked
B
whom you just talk to her
C
who you just talked
D
whom you just talked to
He has a friend who ____ the piano very well .
#42707
A
play
B
playing
C
plays
D
played