As more people travelled on the underground, the system was ________ and more lines were added.
A.enlarged B.alarmed C.fined D.violated
Search engines search the Internet based on the key words you type in, and choose such web pages for you ________ contain the words you ask for.
A.where B.who C.which D.as
Some people are skeptical about the internet, ________ that surfing the Internet is a waste of time.
A.claimed B.claiming C.to claim D.having claimed
In the past, a needle like a small sword could be used for letting liquid out of body parts which had______.
A.swollen up B.linked up C.dropped out D.worn out
Since the new drug was needed for World War Ⅱ, the government approval process for penicillin was ________, and mass production began in 1944
A.possessed B.wound C.accelerated D.opposed
Modem TVs use many of the ________ first discovered by Farnsworth, who contributed a lot to the development of TV
A.platforms B.principles C.sources D.symptoms
