Change the sentences into the passive voice. fred will book seats in advance. they left their coats in the cloakroom ten minutes ago. susan bought a programme yesterday.a wonderful curtain covers the stage. the orchestra will begin to play the overture in a minute. their repertoire includes both classics and modern plays. every season the company adds several new productions to its repertoire. we didn't use the opera-glasses at the theatre yesterday evening.

Seats will be booked by Fred in advance.
Their coats were left in the cloakroom ten minutes ago.
The programme was bought by Susan yesterday.
The stage is covered by a wonderful curtain.
The overture will start to be played by the orchestra in a mi­nute.
Both classics and modern plays are included in their repertoire.
Several new produc­tions are added to the company's repertoire every season.
The opera-glasses were not used by us at the theatre yester­day evening.

The seats will be booked by Fred in advande.
Their coats were left by them in the cloakroom ten minutes ago.
A programme was bought by Susan yesterday. The stage is covered with a wonderful curtain.
The overture will be begun to play by the orchestra in a munite.
Both classics and modern plays are included in their repertoire.
Several new produc­tions are added every season by the company to its repertoire.
The opera-glasses weren't used by us at the theatre yester­day evening.