单项选择题

（） that our knocking could not wake him up.

A、So deeply he slept
B、So deeply did he sleep
C、Did he sleep so deeply
D、Deeply he slept

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The production of too many useful things results （） too many useless people.

A、 from
B、 out
C、 up
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Tourists often surprised at （） so many flat and good roads in the mountainous regions.

A、there are
B、there being
C、there to be
D、there were
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