of the juiceorange. It’s very pure.

________ the problem of land erosion(侵蚀) getting more serious, the government is searching for a way to deal with it.

Thanks ________ your help, or we couldn’t finish the work ________ such a rainy day. [ ]

Great changes have taken place in that school. It is no longer ______ it was 20 years ago, _____ it was so poorly equipped.

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.