Question

请你从下面的方框里挑选合适的短语填空。注意变换形式噢！

1．This kind of notebook computer ________ 8,000．

2．Lucy often ________ her mother ________ housework．

3．The ________ in the world is more and more serious．

4．We must ________ the children ________ from the fire．It's dangerous．

5．Daniel is ________ to living on Mars．

Answer 1

答案：
解析：

1．is worth　2．helps,do　3．air pollution　4．keep,away　5．making a guide