The factory produced many kinds of bikes, none of ___  __ shipped to foreign countries.
#14131
A
them
B
which
C
that
D
what
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We already have ______ pencils, but we need two ______ pens.
#14559
A
dozen of, doze
B
dozens of, dozens
C
dozens of, dozen
D
dozens of, dozen of
 In ____, he began to learn Russian, when he was in ______. 
#12067
A
1970; the 50’s
B
the 1970; his 50s
C
the 1970s; his fifties
D
1970s; his fifties