单项选择题

______ still young, Mr. George has had amazing achievement in cosmology.

A. When
B. As
C. Although
D. Since
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The report showed us clearly how the car got ______ and crashed at last.
A. into control
B. under control
C. within control
D. out of control
单项选择题
You can't come in, ______ you are.
A. whichever
B. whoever
C. wherever
D. whenever
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