Life in the future（The First Period）

ss：yes.
t：ok.let's begin.
(teacher plays the tape for the first time.then plays for the second time，during which time teacher may pause for the students to write down the in-formation
.finally teacher checks the answers in part l with the whole class.)
t：next listen to part 2 and do the two exercises in them.
(teacher lets the students go through the e in part 2 and then plays the tape for the students.at last check the answers.)
step ⅳ speaking
t：now look at the picture in speaking part.there are two girls in the picture.one girl is working on the com-puter.the other is making a phone call.can you find anything different between them?
ss：no.they are the same.maybe they are twins.
t：no，they aren't twins.one of them is cloned.with the development of tech-nology，scientists will be able to clone persons as well as animals.suppose the year is 2089 and scientists have discovered how to make“doubles”，ex-act copies of a person that can do eve-rything the original can do.now work in groups of four to discuss the question whether the new techno1ogy should be used.first give your opinion  and tell the reason.write it in your textbooks.after that make up a short dialogue,
using the information in your books and the useful expressions on the blackboard.
(bb：it would be wonderful if…
it would be bad for…if…
it’s possible/impossible to predict…
no one can predict what/when…
just imagine if…
we can only guess…)
(teacher gives the students four mi-nutes to prepare in groups of four and then asks some groups to read their dialogues before the class.)
sample dialogue：
sa：with the development of science and techno1ogy，the double would be made in the future.i think it would be a good idea to have a double. because we could use the double to do the things we don't enjoy，for example, we could let the double finish our  homework.
sc：i agree with you.i would 1ike to have a double, too，because i don't have time to do all the things i'd like to do.for example，if i didn't have time to watch an exciting football game, i would let the double watch it.
sb：i don't agree with you.i think having a double might be dangerous because you don't know what the double might do.for example，the double might steal what they what they want or kill the person they hate.
sd：yes，they might do something wrong. what's more，having doubles would make people confused，because no one would know who the double really was or how to treat it.for example, the double wouldn’t have any parents and no one would see to them.