It was not until the early 1950s ______most tape recorders began using plastic tape as they do today.
#85243
A
when
B
which
C
that
D
Before
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__________ that has caused the trouble and ________ that we should scold(批评).
#85251
A
It was him; it was he
B
It is he; it is him
C
This was he; that is him
D
That is him; that was he
__________ his work was still as it had been?
#47003
A
It was why that
B
Why is that
C
It is why that
D
Why was it that
It was on the last day ______ a press conference was held by some committee members.
#84831
A
where
B
that
C
when
D
how
John's success has nothing to do with good luck. It is years of hard work has made him what he is today.
#84915
A
why
B
when
C
which
D
that