American women usually consider their best friend as someone ________ they can talk frequently.
#76988
A
who
B
whom
C
about which
D
with whom
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The man I ______ yesterday in the street is my manager. 
#76901
A
paid a visit
B
had a talk
C
met
D
dropped
This is a very convenient place to live in,     is an airport connecting all the big cities.
#75804
A
20 km northwest of it
B
20 km northwest of which
C
northwest 20 km to it
D
northwest 20 km of which