1 . Japan had hatched a p__________to launch a surprise attack on Pearl Harbor,so the attack began without warning and without declaring war on the US. (根据首字母单词拼写)

2 . The way you think of ________ (improve) writing skills sounds reasonable. （所给词的适当形式填空）

3 . You may drink, smoke, be overweight and still reduce your risk of ________ (die) by running. (所给词的适当形式填空)

5 . Japan had to postpone ________(hold) the Olympic Games _______ a result of the COVID-19. (所给词的适当形式填空)

6 . It is a waste of time ______________________.  
和他讨论这些问题就是浪费时间。

7 . ______________________ are very important for language learning.  
说和听对语言学习非常重要。

8 . __________(go) to Hangzhou by train takes about 10 hours from here. (所给词的适当形式填空)

9 . I don’t agree this is of poor quality. For a start, it is a book well worth ________(read). （用所给词的适当形式填空）

10 . We are all looking forward to ____________(visit) the museum soon. (所给词的适当形式填空)