1. (2018高二下·西城期末) 用方框中单词的适当形式完成下列句子，每个单词只能使用一次。

doubt  fluent  donate  large  sincere  absence  instruct

1. （1） Speaking English can smooth one's path to success.
3. （2） With so many people, we had to put off the meeting till next week.
5. （3） Tom didn't believe me and looked at me with eyes.
7. （4） This App is designed for elderly people， so there should be simple to follow.
9. （5） You should often watch English programs so that you can your vocabulary.
11. （6） Since the summer holiday is drawing near， I invite you to join us in the camp.
13. （7） Frank， a generous man， a lot of money to the victims of the earthquake last year.