I met a friend of mine _____ I was walking in the park.
#41311
A
before
B
when
C
after
D
if
推荐题目
You're the only person ______I've ever met ______could do it. 
#73843
A
who;/
B
/; whom
C
whom;/
D
/; who
_________ is unknown to us all.
#70547
A
Where did he get it
B
Where he got it
C
That where he got
D
Which he got it
________ more careful, the work might have been done better.
#70493
A
Being
B
Having been
C
If you had been
D
To have been