We were swimming in the lake _____ suddenly the stormstarted.

He ______to swim across the Channel, but they failed because of the terrible weather

China ______ the WTO for more than 10years, and it has brought great changes to it.

I prefer shuttingmyself in and listening to music all day on Sundays.— That’s ______ I don’t agree. You should have a moreactive life.

Parents are taught to be aware of _____ important mental health is to their children.