Stephen Hawking (consider) to be 'the greatest scientist in history', along with Isaac Newton and Albert Einstein.
He is not an honest man,what he said is (believe).
Maria (not do) exercise in the morning.She prefers doing it in the evening.
The graduation ceremony is on the way,there are some students (make) preparations for it.
My mother is (fortieth) years old,but she looks much younger than she really is.
To perform perfectly,we still need 8 pairs of white (trousers).