He goes to school by bus, but he walks ______after school.

—I don’t know much about computer.—I don’t know,      . Let’s go and ask our computer teacher for help.

I find this computer game ______ to play.

----I didn’t know you go to school by taxi.----Oh, I __________ take a taxi to school, but my bike needs repairing.

French is _______ difficult to learn.