★ Grammar Modals
Experts say there might ______ (be) only 540 Amur tigers left in the world today.
A. been
B. have be
C. be
D. been
Preview next quiz:
Blue whales can _____ from 82 to 105 feet and weigh up to 200 tons.
A. be ranging
B. ranged
C. range
D. have been ranged
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