Ⅳ. 根据短文内容，在空白处填入一个适当的单词或括号内单词的正确形式。
Hongli will have dinner at his friend's house tonight. But he thinks that English table manners are so 1. (confuse) that he's a little worried. Sam is 2. boy from London. He gives Hongli four tips to help him enjoy 3. (he) at his friend's house.
Firstly, he should bring a small gift. The gift can't be food 4. the host asks him to do so. Secondly, he has to wait for the host to start before he 5. (eat). Thirdly, to use a knife and fork 6. (proper), he should hold the knife in his right hand and the fork in his left hand. There's no need 7. (worry) if he gets confused; he can just watch what everyone else does. 8. (last), he should thank the host and say that everything is delicious.
Thanks 9. Sam's tips, Hongli doesn't worry about the table manners any more! Both Sam and he agree that the 10. (important) thing is having a good time at his friend's house.

1. confusing 2. a 3. himself 4. unless
5. eats 6. properly 7. to worry 8. Lastly
9. to 10. most important