—Bob has gone to California.—Oh, can you tell me when he        ?
#101937
A
has left
B
left
C
is leaving
D
would leave
推荐题目
The first decade in the 21st century _______ the rapid rise of China as a world economic power.
#102847
A
witness
B
has witnessed
C
will witness
D
have witnessed
It is ten years since he _______ in this college.
#101795
A
works
B
worked
C
has worked
D
had worked