Jim, who taught ________Chinese before you came to school?—Nobody. I learned it by _______.

yogurt do you need to make fruit salad?[ ]

Talking loudly in a library is impolite.—In fact, we should also take care not to cough or sneeze loudly in public.

Please write down your plans_____ this year.[ ]

I often visit my parents, who live in the countryside whenever ____.