John must be asleep.
A. I’m sure John is asleep
B. It’s possible that John is asleep
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Vocabulary › Vieworganisms that have the same characteristics and can reproduce with one another
A. unique
B. traits
C. variations
D. species
Grammar › View
Marcus started learning French two years ago.
A. Marcus’s learning of French lasted only two years
B. Marcus has been learning French for two years
C. Two years is enough for Marcus to learn French
D. Marcus needed only two years to learn French
Grammar › View. Why is grammar often referred to as a system rather than a set of rules?
A. It is created before the language itself
B. It is unchanging and fixed
C. It evolves with language use over time
D. It is imposed by language authorities
Grammar › View
. Some people are more concerned _______ about the budget cuts.
A. they are than others
B. other than
C. than others
D. other than them