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

Did you return from Shanghai on time?—No. The train________ I took was late because of the bad weather.

When can I come here for the photos? I really need them tomorrow afternoon. —They _______ be ready by 12:00.

I need five Yuan to ______ for summer camp.

Our history teacher is very ______ with us. He doesn’t allow us to be lazy.