______is now no doubt ________ global warming is a security threat to us all.

“Only two centimeters higher, _______ break the world record,” encouraged the coach.

He called another girl, ______ was more suitable for the position.

. Mary was only too ready to help others, seldom, _____, refusing them when they turned to her.

 As the saying goes, _________. So take it easy and read the question slowly within then given time when you take the test.