把下列句子改成以if / whether 引导的宾语从句
例如Example:Is it polite to point at people with chopsticks in China?A:I want to know whether/if it is polite to point at people with chopsticks in China.B:I don't think that it is polite to point at people with chopsticks in China.改这5句1.Is it polite to eat soup very quietly in most African countries?2.Can people smoke during a meal in France?3.Will people leave as soon as they finish eating in western countries?4.Do Americans eat food like chicken legs with their fingers?5.Does a formal western dinner always start with a small dish?