（四）On a summer afternoon in 1666, a young man with a book under his arm sat down under a tree in his garden. An apple suddenly (突然地) fell and hit (打) on his head. The pain (疼痛)    (1)    not really bother (打擾) him. Instead (反而), it made him start thinking. He was curious (好奇的) to know why the apple fell in this direction (方向).    (2)      didn’t it fly to the sky？           This young man    (3)   the 23-year-old Isaac Newton. He kept (一直) looking for the answers to his questions. He finally (最後地) developed (發展) the theory of gravity(地心引力理論). Because of his scientific (科學的) attitude (態度), Newton became one of the most (最) important scientists in the history. Like every good scientist, he was interested (感興趣) in finding out why things    (4)    and he also noticed (注意) everything around him.

【題組】1.
(A)do
(B) does
(C) did
(D) done