67.
We can infer from the text that ________.
A. water can flow through a hard layer of
bedrock or clay
B. the friction can keep the rock and soil
debris flowing
C. debris flows can never be predicted by
scientists
D. debris flows tend to happen on the same
hillsides
V. 选词填空(共6小题,每空
1 分,满分6
分)
|
head, fail,
manage, react,differ ,
rate, lack |