2. Harward, _____ in 1636, is one of the most famous universities in the U. S.

A. set　　　　　 　　　 B. found　　　 　　　　 C. discovered　　　 　 D. founded

从(A，B，C，D)四个选项中，选出可以填入空白处的最佳答案。

1. The physics teacher was standing by the desk, explaining the exercise _____ the students had done at home.

A. /　　　　　　 　　 B. to　　　 　　　　　　 C. for　　　 　　　　　　 D. with