1. 选词填空

break down, by contrast, make inferences, figure out, feel down, get through

1. （1） Optimism, , can make you happy, healthy and successful.
3. （2） In order to , he looked into the matter many times and asked many people.
5. （3） Let's the project into smaller parts in order to deal with them one by one.
7. （4） When you or lost, this notebook can be your source of inspiration.
9. （5） I was glad to hear that she the exam, which she had been preparing for a long time.
11. （6） I could hear them talking but I couldn't what they were saying.