7)A new supermarket … …. next Saturday. (to open)
18)This tragedy … …. by W. Shakespeare. (to write)
19)The doctor … …. at once. ( to send for)
20)In this hotel rooms … … every day. (to clean)
21)Last Sunday my bike … …. by Dad. (to repair)
18) is written
19) is sent for
20) are cleaned
21) was repaired