假如你叫李宏，准备暑假和父母外出旅行。请你给旅行社写封信。提出你们的愿望和要求。
1．乘飞机去凉爽的地方。
2．假期大约10天时间。
3．需要一个导游。
4．父母想看日落，我想游泳。
Dear Sir，
_________ _________
What ________ useful book! And ________ book is popular with students．
A．a；a B．an；a C．the；the D．a；the
--Can I help you?
--I'd like a cup of coffee ________ milk ________ it，please．
A．at；in B．with；in C．with；on D．at；on
--Who's that under the tree? Is it Jenny?
--It ________ be Jenny．She's ill in hospital today．
A．can’t B．must C．may D．mustn't
--Excuse me．Could you tell me ________? I want to post a letter．
--Sure．It's between Hongqi Supermarket and Jinglong Hotel．
A．where was the post office B．where the post office is
C．how can I get to the cinema D．how I can get to the cinema
--Do you know the girl ________ is from Canada?
--Yes，her name is Helen．
A．whom B．which C．whose D．who
--Where is your father，Leo?
--He is in Hainan on vacation．He ________ for two weeks．
A．has been away B．has left C．has gone D．left
--Kevin，is your twin brother the same as you?
--No．I'm ________ than him．
A．a little thin B．very thinner C．much thinner D．a little thinner
--How beautiful your hometown is!
--Yes，a number of trees ________ around Dazhou every year．Our environment is getting better and better．
A．are plant B．are planted C．are planting D．were planted
--Can you come to my birthday party next Sunday?
--Oh，thanks．________
A．Yes，please． B．I've no idea． C．I'd love to． D．Yes，I would．