高等继续教育 / 大学英语I
正确率：100%
题型描述: 单选题
Greater efforts to increase agricultural production must be made if food shortage ＿＿＿＿＿＿ avoided.
A.is to be
B.has been
C.will be
D.can be
Greater efforts to increase agricultural production must be made if food shortage ＿＿＿＿＿＿ avoided.
A.is to be
B.has been
C.will be
D.can be
参考答案：
佳题速递：