The audience, （　）, enjoyed the performance.

A:most of them were students B:most of whom were students C:whom they were students D:they were mostly students

(Leading) scientists are often the (kinds of person) who (have enjoyed) intellectual challenges (all their lives).

A:Leading B:kinds of person C:have enjoyed D:all their lives

He (was) (lying) (on) the couch, (enjoyed) his cigar.

A:was B:lying C:on D:enjoyed

The audience, ______, enjoyed the performance.

A:most of them were students B:most of whom were students C:whom they were students D:they were mostly students

(Leading) scientists are often the (kinds of person) who (have enjoyed) intellectual challenges (all their lives).

A:Leading B:kinds of person C:have enjoyed D:all their lives

The audience, ______, enjoyed the performance.

A:most of them were students B:most of whom were students C:whom they were students D:they were mostly students

He (was) (lying) (on) the couch, (enjoyed) his cigar.

A:was B:lying C:on D:enjoyed