1.It was not until 1920 ________ regular radio broadcasts began
A.which
B.when
C.that
D.since
2.No one failed in the exam, ________?
A.was he
B.did one
C.did they
D.didn’t he
3.One can’t be too modest, can ________?
A.one
B.he
C.it
D.we
4.________ usually go to church every Sunday
A.The Brown
B.A Brown
C.Browns
D.The Browns
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