14 If you don't understand this text, you can turn to the teacher for help.
15 What is the difference between these two languages?
16 In order to serve people better,we study very hard.
17 It is said that another hospital has been built in the town.
18 It is said that there will be a class meeting this afternoon, but you had better confirm it.
19 She would rather go with us instead of staying at home.
20 I would rather read books instead of playing on Sundays.
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