91. He got good marks at his exams because all the lessons _____ carefully by him.
A. are revised B. had revised C. had been revised D. were revised
92. Nowadays, young people are free to choose their mates and they are encouraged____at least at the age of 23.
A. marrying B. marry C. to marry D. married
93. The fishermen and their boats _______ were off the coast three days ago have just been reported to be missing
A. which B. that C. who D. whom
94. When I woke up and looked outside, the landscape had changed. The ground had been lightly_______ with a
dusting of snow during the night.
A. covering B. cover C. covers D. covered
95. Birds make nests in trees _________ they can hide their young in the leaves and branches.
A. which B. where C. that D. in where