One day something went wrong with a man’
题型：完形填空
问题：
One day something went wrong with a man’s bicycle chain(链条). The man could not repair it, so he looked 16 for help. The only house nearby belonged to a woman who had 17 there a few months earlier. The man knocked at the door, but the woman did not answer. The door had clear glass in it, and the man 18 see that the woman was home. He decided to knock again. Finally the woman came to the door. The man immediately explained his 19 . “I can fix the chain,” the woman said. Later when the bike was 20 to go, the man said, ‘Thanks. I hope I can help you some day.”“I never need help,” the woman said. The following week the man was riding his bike 21 he noticed the woman walking down the street. A strong wind suddenly lifted(拾起) her hat and sent it into the branches(枝) of an old tree. The woman tried to get her hat with a stick, but she failed. She seemed 22 because she clearly was not dressed for tree-climbing. The man hurried over, quickly climbed up to the hat and 23 it into the woman’s waiting hands. When she put on her hat, she 24 the man as he climbed back on his bike. ‘I think I told you I never need help,” the woman said, “I’m glad you didn’t 25 me. Thanks.” Then they both smiled.
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Mg（OH）2
MgCl2·6H2O
MgCl2
Mg