27. Some small businesses have neither the timethe resources to compete with these big businesses.
A. or
B. nor
C. and
D. but
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28. This website may contain links to other websitesprivacy practices may be different from ours.
A. that
B. which
C. who
D. whose
29. The company_ its sales by an average of 10% per year since its establishment in 1993.
A. increases
B. increased
C. is increasing
D. has increased
30. The flight scheduledat 9 a. m. was delayed four hours due to the bad weather.
A. to take off
B. take off
C. taking off
D. to be taken off
21. After theythe first super computers in the 1940s, scientists and engineers began to develop ways to create networks.
A. create
B. created
C. have created
D. has created