(2013·湖南省部分重点中学5月联考)—What are they up to?It’s so noisy.—Some students________a party.
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A
have had 
B
are having
C
had had 
D
were having
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---Remember the first time we met, Mary? ---Sure.You ______ in the supermarket.
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A
had shopped
B
have shopped
C
were shopping
D
shopped
 Frank ______ London by train which ________ at 8:30 next morning.
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A
is leaving for; will leave
B
are leaving for; leaves
C
is leaving for; leaves
D
will leave for; will leave
 We will lose the game unless he ______ us. 
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A
helps
B
helped
C
was helping
D
has helped