1．The experiment performed (做；执行) in the 1990s showed that many plants tolerate a wide range of light conditions.
2．In order to get familiar (熟悉) with the new neighbour, I decided to call at his house.
3．Nie Er is considered as one of the most famous musicians (音乐家) in China.
4．She pretends (假装) that she likes them so that she can get their help.
5．The girl student is very sensitive (敏感的) to what others think of her and easily annoyed by comments, whether they are praise or criticism.
6．I put the letter in an envelope, attached (附上) a stamp and mailed it.
7．Walking is a good form (形式) of exercise for both the young and the old.
8．When the fire broke out, many passersby (过路人) volunteered to put it out.
