He made up his mind to devote all he could _____ his spoken English before going

题干

He made up his mind to devote all he could _____ his spoken English before going to college.

A．to be practicing	B．practicing
C．practice	D．to practicing

上一题下一题 0.64难度单项选择更新时间:2015-11-16 05:16:28

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