单项选择题

So little（）about mathematics that the lecture was completely beyond me.

A. I know
B. I knew
C. do I know
D. did I know

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单项选择题
（）new employee feels insecure during（）first few weeks on the job.

A. Many ...their
B. Many...his or her
C. Manya ...their
D. Manya...his or her
单项选择题
I walked too much yesterday and（）are still aching now.

A. my leg muscles
B. my leg's muscles
C. my muscles of leg
D. my muscles of the leg
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