四级练习2014.06.27
[audio]http://sound.yywz123.com/tingbbs/cet4/cet420140627.mp3[/audio]M: Hi,Sue.Where have you been?
W: Oh.Hi,Dan.I was just at the library.I have to hand in my biology paper tomorrow.
M: Tomorrow? Oh, no,I thought it wasn't due till Monday.
W: Oh. Don't worry.(1)_________________________.
M: Oh, where are you going?
W: California.We're having a family reunion.It's my grandmother's ninetieth birthday.So, all the cousins and aunts and uncles are going.She planned the whole thing herself.
M: Wow. That's great.How many people will be there?
W: Around sixty.(2)_________________________.So, have you started working on your biology paper?
M: Yeah. I'm doing it on bees and how they're able to recognize whether another bee is related to them.
W: How can they tell?
M: They use their sense of smell.(3)_________________________.If it is,it's allowed to enter.
W: Interesting.Can other insects do this?
M: Well,the paper wasps can.Each wasp nest has a special combination of plant fibers and so the wasps that live there have a unique smell.Those two are only kind I've read about so far.
**** Hidden Message ***** It is due Monday,but I am going away for the weekend and will be back on Monday night.
My family is big and spread out but we are pretty close.
The sweet bee guard their nest this way,If another bee approach the nest the guard determine if the new bee familar.
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