AIDS is said_______ the biggest health challenge to both men and women in the earth over the past four years.
As your instructor advised ,you ought to spend your time on something ______researching into .
Fancy Williams not ______the answer to such an easy question !
______letting go of a god chance like that ,the silly girl .!
Thes chemical ,_______to kill biological organisms ,are unsafe and oten not specific in their targets .
It was reported that of the six people injured in the crash ,only two _______.