The doctor recommended that you _____ swim after eating a large meal.

When a new disease breaks out, experts must ________ what to do in the fastest way.[ ]

What pleasant weather! Shallwe go boating on the lake— _______.

Nobody could understand her though she tried to her idea by using the simplest English, because they are foreigners.

What do you think of this performance?—______，I don’t like it very much.