[ Grammar ]
Which is ______ , lead or iron ?
A. heavy
B. heaviest
C. as heavy as
D. heavier
Select your answer:

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Adjective › ViewBill understands Spanish ________.
a. good
b. well
Vocabulary › View
Scientific help to explore some places and discover more and more remote parts of the world.
A. survey
B. research
C. lead
D. expedition
