Ants are the most common life form on earth, ___________ tiny, their combined weight is greater than that of the combined weight of all humans.
He must have attended the meeting yesterday,___________ he?
I was really too busy with my homework and I couldn't help ____________ housework.
Mary is one of the brightest students who_________ from New York University.
Mary is short__________ her brother is very tall.
It’s clear__________ that a hard working student has___________ a great interest in science.