[ Vocabulary ]
a substance that is present at the end of a chemical reaction
A. reactant
B. solution
C. solvent
D. product
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Question Tags › ViewYou didn’t visit the museum, ____________________?
A. didn’t you
B. did you
C. were you
D. weren’t you
Grammar › View
_____ they left?
A. Has
B. Do
C. Does
D. Have
…………………he at home?
A. Be
B. Am
C. Are
D. Is
Relative Clause › View
The man __________ lives on the third floor is an artist.
A. who
B. whom
C. which
D. whose