_______ which way to take, the little boy behaved like a real gentleman who comforted his sister from time to time.

Maybe if I________ science, and not literature then, I would be able to give you more help.

 —Why didn’t you put your cellphone in your overcoat pocket?—I _____, but I was afraid it would be stolen.

At last he       finish the work ahead of time.

--- What have you learned from your experience in Japan? --- Well, meeting people from another culture ___ be very difficult.