[单选题]Directions: In this part there is a sentence with four choices marked A, B, C and D. Choose the one that best completes the sentence.Among the crises that face humans （ ） the lack of natural resources.
A
is
B
are
C
is there
D
are there
正确答案：A
题目解析
考查倒装句。
根据句子结构可知，该句为完全倒装句。用法为，表示方位的介词短语among the crises放在句首，句子要使用完全倒装，把谓语动词提前到主语之前。由此可知，该句的主语为the lack of natural resources单数，句子本来应为The lack of natural resources is among the crises that face humans。故选A。
