单项选择题

Writing is a slow process, requiring（）thought, time, and effort.

A、 significant
B、 enormous
C、 considerable
D、 numerous

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单项选择题
There are very few rides of grammar（）.

A、 that are not with exceptions
B、 but have exceptions
C、 not having exception to them
D、 not with exception to them
单项选择题
The reason for my refusal is（）you're undependable.

A、 because
B、 due to
C、 that
D、 for
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