V．课文填空：请根据模块3课文内容，在下面的空格中填上适当的单词，完成下面的两个段落，每空填写一个单词。（共10空，每空1分，共10分）

A week later, Wang Peng’s restaurant was nearly full and he felt___11_____. Perhaps he would be able to ______12_______ his living after all and not have to close his restaurant. He did not look forward to _____13________ in debt because his restaurant was no longer ____14________. He smiled as he welcomed some customers ______15______ at the door but the smile left his face when he saw Young Hui walking in.

Water had also appeared on other planets like Mars but, ____16_______ the earth, it had disappeared later. It was not immediately obvious that water was to be ______17________ to the development of life. What many scientists believe is that the ______18_________ presence of water _______19_______ the earth to dissolve harmful gases and acids into oceans and seas. This produced a chain reaction, which made _____20_____ possible for life to develop.