[ Past Perfect Simple & Continuous ]
He ___ all over the world by his 30th birthday. (Past Perfect Simple)
A. had been travel
B. had to travel
C. had travelled

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Grammar › ViewCheck this sentence for verb tense consistency.
As Barbara puts in her contact lenses, the telephone rang.
A. It is correct as it is.
B. Change puts to put.
Grammar › View
The man _____ the office is the manager’s father.
A. is entering
B. he’s entering
C. enters
D. entering