It's known that the universe ______, and this will continue ...

★ Present Perfect Simple & Continuous

It’s known that the universe ______, and this will continue to happen in the future, too.

A. expanded

B. expanding

C. has been expanding

D. was expanding

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It’s amazing that Martha ______ 15 books this month.

A. has been reading

B. has reading

C. has read

D. read