When your computer begins to run slow, it is a ______ that it has been attacked by computer virus.

 A. signal    B. symbol   C. reality   D. character

________your naughty niece closely and don’t let her ________ my regular sleep in the afternoon.

 A. Watch out; ruin    B. Watch over; spoil   C. Watch on; destroy   D. Watch out; spoil

If you want to know more information about the Analytical Machine, ______ the following Website: www.computer.net

There were _____ many people in the zoo _____ it was hard to get through the crowd to see the animals.

 A. such; that   B. so; that   C. too; that   D. quite; that

--Has she agreed to the date for the meeting?

--Well, that’s _____ she disagrees

A. what    B. where   C. when   D. which

Misunderstanding is likely to ______ if people fail to communicate with each other.

I do hope that one day the Chinese language will become a ____ language, that is, everyone in the world will communicate in it.

A. common    B. universal   C. popular   D. special

Computers have been made ______ clever that they can ______ problems like humans _______.

 A. such; deal with; in a way            B. so; do with; in a way

C. such; do with; in the way            D. so; deal with; in a way

A lot of technical problems have to be solved ______ this new type of digital camera _______its appearance in market.

 A. when; makes   B. until; will make   C. before; makes   D. after; will make

_______ the help of this new type of calculator, people will be able to _______ much faster with more accurate figures as a result.

 A. With; calculate   B. Under; work out   C. By; make out   D. For ; count