[ Grammar ]
My sister …………… for you since yesterday.
A. is looking
B. was looking
C. has been looking
D. looked

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Grammar › Viewwhat is subject?
A. Part that contains the action.
B. The person or thing that is doing an action, or the person or thing that is the focus of the sentence.
C. Both of the above.
Grammar › View
How old ____ your sister?
A. am
B. are
C. is