[ Grammar ]
There are thought ________ more than 200 different types of fish in the river.
A. being
B. there are
C. to be
Select your answer:
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Tenses › ViewThis exercise is ___ than the last one.
A. challenging
B. challenginger
C. more challenging
D. most challenging
Grammar › View
Which is not considered part of informal language?
A. talking with a friend
B. using slang
C. personal writing
D. writing an essay in school