Do you think yesterday’s math problem was difficult? —Yes. I could ________ work it out.
Dad, please tell me when Mum_____. I miss her very much.——She will return when she_____her task. And she will bring a nice present for you.
Is your home ______ the park? —No, it’s ______ the park. [ ]
Miss Lin ______ a lot of work for the poor area for about 10 years.
Where can we spend our summer holidays, Joe?—Why not consider_____ Tibet . It’s convenient to get there now.