1 . If you have not reached your goal, do not ________ ________ (丧失信心). Continue to work hard, and you will be able to do the best.(根据汉语提示完成句子)

2 . As a saying goes, “don’t j___________ a book by its colour.”（根据首字母单词拼写）

3 . Don’t ________ (怀疑) him, for he is very reliable. (根据汉语提示单词拼写)

4 . Please don’t _________ ________(犹豫) contact me for any further information. (根据汉语提示完成句子)

5 . In the event of difficulties, please do not h__________(犹豫) to contact our Customer Service Department. (根据中英文提示填空)

6 . Don’t ________(犹豫) to talk to your teachers or parents if you have difficulties.（根据汉语提示单词拼写）

8 . 不要不懂装懂。（汉译英）

9 . 即使天气再热，也不要整天待在空调房间里。(stay)