. ____________ the dinosaurs disappeared still remains a mystery.
.She reached the top the hill and stopped ______on a big rock by the side of the path.
Tom kept quiet about the accident ___lose his job.
.-Shall we go skating or stay at home? -Which _______do yourself?
It is foolish ______such a mistake.
I don’t think it advisable_______.
red still remains a mystery.red still remains a mystery.
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