_______ difficult and challenging the task may be, we must finish it on time, because there is a possibility _______our work will go down in history.
A. Whatever; that B. However; as
C. Whatever; which D. However; that
He bought a house,___________ the price is reasonable.
A. whose B. its C. of which D. of whom
In the reading room, we found her ________ at a desk, with her attention ________ on a book.
A. seating; fixing B. seated; fixed C. sitting; fixing D. to sit; fixed
All those second-hand cars are sold at before
A．40％as lower price as B．40％as low a price as
C．as 40％low price as D．40％lower price than
What _______ pity that you must leave now! It is such _______ great fun to have dinner with you
A． a; a B． a; the C． /; a D． a; /
你是一名高三年级学生。你发现班上有些同学晚上学习到深夜，白天也不安排休息时间，但往往课堂上昏昏欲睡；有些同学饮食习惯不好，不吃早餐。请你写一篇发言稿，在班会上劝同学们合理安排作息时间，注意健康饮食，保证学习好、身体好。
注意：1、发言稿须包含上述要点，但可适当发挥，使讲话完整通顺。
2、100词左右。
Dear classmates,
It’s a pleasure for me to have a chance to make a short speech today.
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