—Do you know the young man well?—Sure, we __________ friends since we met in Nanjing three years ago.
#36245
A
have been
B
were
C
have made
D
have become
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Each year quite a lot of food ______ around the world. It’s really time for us to do something.
#36622
A
was wasted
B
is wasted
C
wasted
D
will be wasted
—Did you notice him come in?—No, I _________a football game.
#39567
A
have watched
B
had watched
C
am watching
D
was watching
My mother _______________ my aunt called her.
#41811
A
was cooking while
B
cooked when
C
cooked while
D
was cooking when