How do you study English?—I study English ______ talking with foreign students.[ ]

Will you go with us for an outing on Saturday?— I’d like to, but I am really busy these days. I can’t _______ a whole weekend.

―It seems that you enjoy the hot pot a lot.―Yes. I ________ living in Chongqing now.

Koalas sleep __.[ ]

I want to write __________ article about the great inventors in the world. Can you help me?–Sorry, I don’t know much about __________ topic.