Topics: Vocabulary and Grammar
Scientists _______researches about new medicines
A. do
B. come up
C. make
Select your answer:
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Grammar and Punctuation › ViewWhat punctuation mark is used to indicate possession?
A. Semicolon
B. Comma
C. Apostrophe
D. Exclamation mark
Modal Verbs › View
What ___ we ___ to do for homework?
A. do/have
B. must/-
C. are/allowed