[ Grammar ]
Choose the correct usage of “which”.
A. Math, my favorite subject, which gives me a headache.
B. Math, students headache, which is my favorite subject.
C. Math, which gives students a headache, is my favorite subject.

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Subject and Verbs Agreement › ViewFifty percent of the milk ____ sold since yesterday morning.
A. was
B. were
C. has been
D. have been
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Hi, Jim. I’m not ____ good with computers. Can you help me?
A. have
B. very
C. was
