White granular powder had fallen upon the roofs and the lawns, the fields and streams some weeks before.
查看答案
The white granular powder was spread by people themselves.
A. 对
B. 错
Actually, the misfortunes have happened somewhere in the world.
A. 对
B. 错
People know clearly of what they should do nowadays.
A. 对
B. 错
1. Selecting a mobile phone for personal use is no easy task because technology _____ so rapidly.
A. is changing
B. has changed
C. will have changed
D. will change
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