单项选择题

Hydrogen is the fundamental element of the universe ________________ it provides the building blocks from which the other elements are produced.

A．so that
B．but that
C． in that
D． provided that
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单项选择题
If individuals (are awakened) (each time as) they begin a dream phase of sleep, they are likely to become irritable (even though) their total amount of sleep (has been) sufficient.
A．are awakened
B．each time as
C．even though
D．has been
单项选择题
In debating, one must correct the (opponent's) facts, deny the relevance of his proof, or deny (that) (what) he presents as proof, (unless) relevant, is sufficient.
A．opponent''s
B．that
C．what
D．unless
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