While other scientists are keeping____eye on changes in the H5N1 bird flu strain, the scientists in England are working on vaccines, in case it becomes highly infectious in ____humans.
#9824
A
a , /
B
an, /
C
the, an
D
an, the
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When it comes to bringing up children, some people say _____ discipline produces _____ happy, well-behaved child.
#10312
A
a; the
B
/; a
C
a; a
D
/; the
The White Deer Plain directed by Wang Quan’an is one of_______most moving films and I really want to see it for ______second time.
#8160
A
a; a
B
the; a
C
the; the
D
a; the
Many people agree that ______ knowledge of English is a must in _______ international trade today.
#10071
A
the, an
B
a, 不填
C
the, the
D
不填, the