单项选择题

All of the plants now farmed on a large scale were developed from plants ______ wild.

A. that once grew
B. once they grow
C. they once grew
D. once grew
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单项选择题
Evidence came up ______ specific sounds are recognized by babies as young as six months old.
A. what
B. that
C. which
D. whose
单项选择题
Mr. Black does not ______ as a teacher of English as his pronunciation is terrible.
A. equal
B. match
C. qualify
D. fit
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