问题
选择题
Doctors recommend that all children ______ vaccinated against measles (麻疹).[ ]
A. should
B. could be
C. are
D. be
答案
答案：D
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Doctors recommend that all children ______ vaccinated against measles (麻疹).[ ]
A. should
B. could be
C. are
D. be
答案：D