The railway _______ Qinghai to Tibet is the longest plateau (高原) railway in the world.
The old man ___ a blue sweater is our new headmaster.
___ the beginning of the meeting, the president made a speech ___ how to reduce pollution.
This beautiful skirt ____________ of cotton. A. is made from B is made of C. makes from D. makes of
This problem is so tough that they can’t find the ____.
________! Said the teacher angrily.