Passive with Modals

This document ____ be destroyed. We have to cover up all the traces of this deal.

• must

• should

• may

• might

This box ___ be handled with care because the clothes in it might get wrinkled.

• will

• can

• should

• might

Nuclear waste ____ be disposed of very carefully.

• can

• may

• might

• must

Special suits _______________________ near a volcano.

• must be worn

• must wear

• must be wore

• mustn't be worn

A rope _________________ to ascend.

• can use

• can be use

• use

• can be used

Safety equipment ____________________ .

• has to be checked

• have to be checked

• have checked

• has to be check

Jack has a right to know. He ________ the news immediately. If you don’t do it, I will.

• ought to tell

• ought to be told

• may tell

• may be told

You'd better not drink that river water. It __________.

• could be polluted

• could pollute

• can be polluted

• can pollute

The accident ruin _________as early as 1792. The historical record is difficult to interpret.

• may have been discovered

• may discover

• may have discovered

• may discovered

The incoming ship ought to ______ contacted by the command center by then.

• be

• have been