单项选择题
A. in B. at C. on D. to
Everyone tried to find an answer to the problem, but （）...
单项选择题Everyone tried to find an answer to the problem, but （）of them could do it.
A. none B. neither C. each D. all
（）box cannot be lifted by a boy of five.A. So a heavyB....
单项选择题（）box cannot be lifted by a boy of five.
A. So a heavy B. So heavy a C. A such heavy D. Such heavy a
The woods （）the city （）the sand.A. stopped; fromB. kept...
单项选择题The woods （）the city （）the sand.
A. stopped; from B. kept; away C. protected; from D. prevented; from
