单项选择题

These machines are better than______we turned out last year.

A．that
B．what
C．those
D．which
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单项选择题
______I had done it, I knew I had made a mistake.
A．Direct
B．Directly
C．Moment
D．Constant
单项选择题
To cultivate the ability to use our hands, mother ______ that we did our share in keeping the house.
A．convinced
B．stressed
C．saw to it
D．ensured
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