He made _____ experiments to prove his theory, and the number _____ added up to 600.
Elbert Einstein, for ______ life had once been very hard, was successful later in science .
In my opinion, all Mr Tom ______ good to his students in his class at present. He is very strict in their study.
______ I had done it I knew I had made a mistake.
--- Can you attend tomorrow’s meeting? --- I am sorry, but I will have too much work ______.
______ he told us is the news _______ China has got 32 gold medals in the 28th Olympic Games in Athens, _________, of course, made the nations feels very excited.