通读下列对话，然后根据上下文补全对话内容。
（ A：David B：Mary ）
A：Hi，Mary. Have you heard of the volunteer activity this week in our school？
B： （1） .
A：Ah，don't you know？It is "Empty Plates Movement". And I'm one of the volunteers.
B： （2） ？
A：We will put up signs about saving food in our school dining hall at first.
B：Oh，sounds interesting!What else will you do？
A： （3） . We have lots of things to do.
B：Wonderful!When will it start？
A：At 3：00 tomorrow afternoon. （4） ？
B：Yes，I'd love to. See you tomorrow.
A： （5） .
Christmas comes in the t month of a year．
（It's Friday afternoon．After school，Sun Mei meets Hu Fang on the way home．）
Sun Mei：Hello，Hu Fang!
Hu Fang：Hello，Sun Mei!
Sun Mei：Tomorrow is Saturday and the weather is fine．I want to climb the Ge Hill．
（75） ？
Hu Fang：Sure，I'd love to．Oh，I hear there's a strawberry garden near it．We can do
some picking in the garden after climbing．
Sun Mei：（76） !I like eating fresh strawberries．We can
also take beautiful photos there．
Hu Fang：Great!（77） ？
Sun Mei：Let's meet at 8 o'clock in the morning at the gate of Yanglan Primary School．
Hu Fang：It's a deal!See you tomorrow．
Sun Mei：See you．
Bamboo is one of the nature's most surprising plants．（1）许多人称这种植物为树，但它是一种草．
Like other kinds of grass，a bamboo plant may be cut very low to the ground，but it will grow back very quickly．A Japanese scientist recorded one bamboo plant that grew almost 1.5 meters in 24 hours! Bamboo grows almost everywhere in the world except Europe．（2）There are more than 1，000 kinds of bamboo that grow around the world on both mountains and plains （平原）．
Not all bamboo looks the same．Some bamboo plants are very thin．They may only grow to be a few centimeters wide while others may grow to more than 30 centimeters across．This plant also comes in different colors，from yellow to black to green．
Many Asian countries have been using bamboo for hundreds of years．They often use bamboo for building new buildings．As a matter of fact，the cables （绳索） that hold up the hanging bridge across the Min River in Sichuan are made of bamboo．The bridge has been in use for more than 1，000 years，and is still holding strong．
In Africa，（3）engineers are teaching poor farmers how to use bamboo to find water ．These African countries need cheap ways to find water because （4 ）they save no money，and their fields often die from no rain and no water．It seems that bamboo is one of the best things they can use．Bamboo pipes and drills （钻） can help to make the poor thirsty fields be watered．
（1）将1处翻译成英文．
（2）将2处翻译成中文．
（3）将3处改成复合句．
（4）写出文中"they"指代的内容．
（5）找出该文段的中心句．
A．How is a day at work？
B．What is hard about your job？
C．Why do you love your job？
D．How much are you usually paid？
E．What skills do you need to be a trapeze （高空秋千）artist？
Reporter：（71） A
Michael：I perform in the evenings，but luckily I don't have to get up early．So in the mornings I sleep in，then practise on stage for 45 minutes．I have to do a lot of exercise before each show．
Reporter：（72） C
Michael：Because it's like a dream of flying．When you do a great performance on the trapeze，it's an unbelievable feeling．
Reporter：（73） B
Michael：Working at such a high level every day．Sometimes you wake up with a stomachache，but you have to perform．
Reporter：（74） E
Michael：You need to be strong to deal with physical training．You mustn't be heavy，or your partner can't catch you easily．You can't be at all nervous when there are 5000 people watching you．
Reporter：（75） D
Michael：We get paid per show and the amount depends on your contract （合同）．Of course，we can get extra money for extra performances．
among jacket discover main necessary
46．It is to have a good diet to stay healthy．
47．David bought his father a on Father's Day．
48．Jiaxing is the most beautiful cities in Zhejiang Province．
49．The book，New Exploring，is written for young students．
50．Scientists are working to a better way to fight air pollution．