单项选择题

The computer works shockingly fast, （） various data at the speed of light.

A、having handled
B、handling
C、handled
D、handles

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单项选择题
I felt somewhat disappointed and was about to leave （） something occurred which attracted my attention.

A、unless
B、until
C、when
D、while
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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