★ Grammar Modals
In the 1940s, there may _____ (be) only 40 Amur tigers left because of hunting.
A. been
B. be
C. be being
D. have been
Preview next quiz:
Experts say there might ______ (be) only 540 Amur tigers left in the world today.
A. been
B. have be
C. be
D. been
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