孩子们经常把家里搞得乱七八糟.The children often____ ____ _____at home.

他姐姐想从事护士工作.Her elder sister wants to_____ ____a nurse.

我们应该一直努力学习.We should study hard_____ ____ ____.

现在,可能有一只笔在你手上._____ _____,you may have a pen in you hand.

看,树枝上有个苹果.Look! An apple is____ ___ ___ ___the branch.