阅读下面短文并回答问题，然后将答案写到相应的位置上（请注意问题后的字数要求）
〔1〕There are many useful suggestions and pieces of advice that can help one to improve English. Here are some useful suggestions and new tips to increase one’s English language vocabulary.
〔2〕Learning English vocabulary is about much more than just learning the right words. A broad grasp of vocabulary in the English language is based on understanding important expressions and “word combinations”, which means groups of words that often or always go together.
〔3〕Learning a word will not help very much if you quickly forget it. Research shows that it takes from 10 to 20 repetitions to really make a word part of your vocabulary. Since most words are learned from how they are used in context （上下文）, the more words one is exposed to（接触）, ________. Keep a writing pad close to you. When you read, pay close attention to the word you do not know, write the word down and try to guess its meaning from the context. Then look up the word in a dictionary.
〔4〕Remember that if you do not use English words that you have just learned in conversation or writing, you will forget them very quickly. So the best way to learn new words effectively is just by trying to use them in conversation and writing. Remember also that practice is the key to fluent spoken English.
〔5〕Building vocabulary is a life-long task. Remember, “In the beginning was the word.” Your future could depend on how rich your vocabulary is. It will also determine the quality of your communication.
76. What is the main idea of the text? (No more than 10 words)
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77. Complete the following statement with proper words. (No more than 5 words)
If you want to learn new words effectively, the best way is using them ________.
78. Fill in the blank in Paragraph 3 with proper words. (No more than 10 words)
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79. Why does the author think context is important in learning English? (no more than 15 words)
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80. What does the word “It” (Line 2, Paragraph 5) probably refer to? (No more than 7 words)
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