Choose the alternative which best expresses the meaning of the idiom/phrase: 'dot the i's and cross the t's'

Spot the error in the given sentence: (A) She told/ (B) her mother/ (C) that she/ (D) were busy.

Choose the alternative which best expresses the meaning of the idiom/phrase: 'skate on thin ice'

Spot the error in the given sentence: (A) After listening to/ (B) much of songs/ (C) she switched/ (D) off the radio.

Choose the alternative which best expresses the meaning of the idiom/phrase: 'to lose heart'

Spot the error in the given sentence: (A) In colonial America/ (B) there has been very little/ (C) to read except for/ (D) the books sent from Britain.

Spot the error in the given sentence: (A) The driver as well as/ (B) the conductor are/ (C) responsible for/ (D) this accident.

Spot the error in the given sentence: (A) Much students prefer/ (B) courses in classical/ (C) arts to courses in science unless/ (D) they are science majors.

Choose the appropriate Passive Voice for the given sentence: Her behaviour annoyed him.