The course of programming in primary school _______ the way for better employment for the students.
A. creates
B. paves
C. starts
D. makes
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The following expression may be used to discuss problems except:______
A. …is to blame
B. ….is valuable …
C. …is vulnerable to…
D. several factors may have caused the …
______efforts must be made to clean up ocean pollution of the earth.
A. Combined
B. Connected
C. Joint
D. Mixed
美国独立战争发生于（）。
A. 1775
B. 1776
C. 1777
D. 1778
中美建交时间（）
A. 1979
B. 1978
C. 1980
D. 1981
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