冠词1.不定冠词a，an表示one或every。如：You have a mouth。表示某一类人、事或物，相当于any。如：A spade is a tool。用于某些固定词组中。如：a bit，a lot of
数词1.基数词(1) 21～99之间的二位数由十位数加个位数再加连字符构成。如24可写成twenty-four。(2) 101～999之间的三位数由hundred加and再加二位数或末位数构
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2016年公共英语pets一级模拟辅导习题一I found myself facing a dry-cleaning store which had once been one of the best restaurants in New York. On Sundays the old man would take my mother an
2016年公共英语pets一级模拟辅导习题二Hotlines have become common in China. Some radio broadcasting stations use hotlines to encourage the listeners to take part in the talk shows.That’s
2016年公共英语pets一级模拟辅导习题三In reading science, a heading (标题)often gives a clue (线索)to a problem that is going to be discussed .Getting the problem clearly in your mi
1.Have a cup of tea, _______?A. shall we B. will you C. won’t you D. do you2.It is estimated that much of a teenager’s time is spent______ with friends.A. to talk B. talking C. being talked D. h