Units 9～10　Saving the earth Frightening nature

答案：b
17.a.hit          b.caught         c.impressed   d.seized
答案：a
18.a.for         b.with           c.of         d.to
答案：a
19.a.hurt        b.realized         c.adjusted     d.asked
答案：d
20.a.respect      b.support         c.thank       d.envy
答案：c
ⅲ.閱讀理解
life on­line can be a much richer experience when you aren’t restricted to just written words and still pictures.even if you’re new to the net，you’ve probably heard about multimedia on­line­listening to audio，watching animations and videos，even playing in three­dimensional space.sound and movement make information come alive.
to experience it，you’ll need special pieces of software called plug­ins.the term “plug­in” refers to a small，add­on piece of software which extends the capabilities of your web browser，like netscape navigator or microsoft explorer，turning your computer into a radio or tv.
when you arrive at a web page which contains a file requiring a plug­in which you don’t have，you will usually receive a message asking if you want to get it by downloading it and installing it into your computer.most of the time，the installation will be automatic.
occasionally，you’ll run into a downloaded file which needs to be decompressed or un­zipped before installation.once installed，plug­ins run automatically，without you having to do anything.
many multimedia controls still need to be obtained from the developer but are installed automatically.
shockwave is a good example of this.all you need to do is go to the macromedia site and click on the link to install the activex control.the rest happens automatically.the next time you go to a “shocked” website，the shockwave control loads and plays the movie.
most plug­ins and controls can be downloaded for free on the internet，although not all will work with every system.some of them，for instance，only work with windows 95.　
1.plug­ins can help us to do all of the following except ________.　
a.listening to music
b.watching animations and videos
c.playing three­dimensioned games