More than one student to do those mathematic puzzles which ________ by the teacher last week. A. has tried / was given B. have tried / were given C. has tried / were given D. have tried /
More than one student to do those mathematic puzzles which ________ by the teacher last week.
A. has tried / was given
B. have tried / were given
C. has tried / were given
D. have tried / was given