It is suggested that some skills teachers to teach the children in these mountainous areas .
A. must be sent
B. be sent
C. should send
D. should send for
网友回答
A. must be sent
(答案→)B. be sent
C. should send
D. should send for
解析：suggest构成从句，从句中用虚拟，should+do,should可省略。