[ Grammar ]
Please be quiet. I _________________ (try) to do my homework.
A. is trying
B. am trying
C. try
D. tries

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Some vs. Any › ViewI can’t speak … Chinese or Spanish.
a. some
b. any
For vs Since › View
Today is Monday. So my mother has stayed in the hospital _______ about twelve days.
A. since
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a. flour
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Relative Clause › View
As a university student, you should know____to use a library very well.
A. how
B. whose
C. that
D. which