单项选择题
A. on B. to C. in D. of
He died（）cancer（）a winter night. A. of, at B. from, in ...
单项选择题He died（）cancer（）a winter night.
A. of, at B. from, in C. for, during D. of, on
（）you understand this rule, you'll have no further diff...
单项选择题（）you understand this rule, you'll have no further difficulty.
A. Once B. Unless C. Only D. Until
