单项选择题

I should be able to finish the task on time,（）you provide me with the necessary guidance.

A. in case
B. provided that
C. or else
D. as if

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单项选择题
On behalf of my company, I am（）to you and your colleagues for your generous help.

A. subjected
B. inclined
C. available
D. obliged
单项选择题
I've told you（）that you cannot go out and play until you've finished your homework.

A. once and for all
B. to all intents
C. all the way
D. in all respects
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