I am trying my best to learn English, but it doesn’t work well! —Don’t worry! Regard it _____ a big challenge! [ ]

________ of my sisters are experts in agriculture. Helping the farmers improve their farming techniques _________their duty.

I feel sorry for those young people who don’t care for their aged people_______mine.

Mum, can I watch TV now? — No, you . It’s too late.

Look, my father bought me a new iPad.—I don’t think we need too many expensive things even though our parents can ______them.