It is necessary that an efficient worker () his work on time.

单项选择题He has come back safely()of his friends.

A.to the much delight
B.to much the delight
C.to much delight
D.much to the delight

单项选择题Why didn’t she tell her boss about her appointment (约会)().

A. Because she thought the work wouldn’t take long.
B. Because she thought the work wasn’t hard to do.
C. Because she didn’t think the boss would let her go.