—Hey ,it’s you, Jackie! I didn’t think you could be here.—A big surprise ,right? I _______ for you all the afternoon.
#100196
A
have waited
B
was waiting
C
have been waiting
D
waited
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It is ten months since he ______ a doctor. 
#101164
A
becomes
B
became
C
has become
D
had become
—Why? Where is the key to the meeting room? —Dear me! You ______ it in the taxi!
#104446
A
had never left
B
didn’t leave
C
never left
D
haven’t left
I ______ for Beijing in a few days. Do you know when the earliest plane ______?
#101136
A
leaves, takes off
B
is leaving, is taking off
C
am leaving, takes off
D
leave, is taking off