How long do you think it will be the Chinese people land on the moon?A. thatB. sinceC. un

问题补充：

How long do you think it will be the Chinese people land on the moon?

A. that

B. since

C. until

D. before

答案：

A. that

B. since

C. until

(答案→)D. before

解析：考查连词，since 自从，until 直到，before 在什么之前，才，就，句意：你认为再过多久中国人民才能登上月球呢？所以选D。