Ann helps Lily with her homework ______ eight o’clock ______ Sunday. [ ]

Tony knows China very well because he ______ in China for twenty years.

I don’t think one can keep healthy _____ taking enough exercise.[ ]

Tomorrow is our holiday. What _____ going hiking? — That sounds great. [ ]

Which of the caps will you take?—I’ll take _______,one for my father ,the other for my brother.