Thanks to the Internet, we can share sorrow and happiness at each other's home through the _____ of e-mail.
A. role
B. medium
C. modem
D. sequence
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In their own eyes, it is rather _____ that the medical community as a whole still has little idea about the cause of SARS.
A. rewarding
B. demanding
C. embarrassing
D. requiring
The government has devoted a larger slice of its financial ____ to agriculture than most other countries.
A. conditions
B. potential
C. budget
D. economy
The long drought caused a(n) ____ shortage of water in this region.
A. urgent
B. acute
C. dense
D. rigid
The history of life on earth has been a history of ____ between living things and their surroundings.
A. introduction
B. interview
C. interference
D. interaction