中国石油大学 / 中石油
正确率:100%
18. Among the most important questions the journalists wanted _____was how to keep the present economic growth without causing damage to the environment?
A、to answe
B、being answered
C、answering
D、answered
A、to answe
B、being answered
C、answering
D、answered
参考答案:
佳题速递: