单项选择题

(Alike) other forms of energy, natural gas (may be used) to (heat) homes, cook food, and even (run) automobiles.（）

A.Alike
B.may be used
C.heat
D.run

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Please send (me) information (with regard of) (insurance) policies available (from) your company.（）

A.me
B.with regard of
C.insurance
D.from

单项选择题

Insulin(胰岛素), (it is) used (to treat) diabetes(糖尿病) and (is) secured (chiefly from) the pancreas(胰腺) of cattle and hogs.（）

A.it is
B.to treat
C.is
D.chiefly from

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