21. Everybody ________ ________ ________ ________(厌烦) his endless speech.

20.《三维设计》“佳篇诵读”检查：

　 节电：及时关闭电灯、电脑等用电设备。

______________________________________________________________________________________________________________________________.

节水：随手关闭水龙头；废水再利用。

______________________________________________________________________________________________________________________________.

节纸：纸张再利用。

　_______________________________________________________________________.

19. ⑴We can't always ________________________________________. 　 我们并不总是能在工作中享受到乐趣。 ⑵He __________________creative imagination and true scholarship. 　 他同时具有创造性想象力和真正的治学谨严学风。 ⑶Two atoms of hydrogen ____________________ one atom of oxygen to form a molecule of water. 　 两个氢原子和一个氧原子结合而成一个水分子。

18. ⑴I'll help as much as I can, but there is __________________to what I can do.我会尽力帮忙，但我所能做的也是有限度的。 ⑵Her ambition knows ____________________. 她的野心没有限度。 ⑶ We must ________________ our spending. 我们必须限制我们的开支。

⑷. I'm willing to help, ____________________.我愿适当予以帮助。 ⑸I shall ____________________ myself to three aspects of the subject. 我仅探讨这一问题的三个方面。

17. _____________________(做研究) /______________________ (进行研究)

16.总结lie的用法：(造句至少3个)

⑴_______________________________________________________.

⑵_______________________________________________________.

⑶_______________________________________________________.

15.⑴_______________________________ (为了利益) those people who arrived late, I’ll just go over the plan again.

⑵It is an expensive investment but it will _______________(使有好处) the company in the long run.

⑶A good diet is______________(有好处的) to health.

14.⑴He is ____________________________(是个强壮的人).

　 ⑵The great ________________(长出)of our plan lies in its simplicity.

13.⑴He’s burning________________(好奇) to know what was happening.

⑵It was ________________(奇怪) that she didn’t tell anyone.

12.请用diet 造句：

⑴________________________________________________________.

⑵________________________________________________________.

⑶________________________________________________________.