解析：选C　句意：没有什么能比微笑更有魔力，甚至在绝望的(desperate)处境中它也能产生希望。embarrassing"令人尴尬的"；confident"自信的"；desperate"绝望的，铤而走险的"；secure"安全的"。

　　Ⅱ.完成句子

　　1．她觉得不舒服，这就是她今天不想出去的原因。

　　She doesn't feel well; this_is_why she wouldn't like to go out today.

　　2．他真是名副其实的"活字典"。

　　He really lives_up_to_his_reputation as "a walking dictionary"．

　　3．获胜者坐在大厅的前面。

　　In the front of the hall sat_the_winner(s)．

　　4．新政府进行了许多必要的改革。

　　The new government made_many_needed_reforms.

　　5．虽然他是老师，但也不可能什么都懂。

　　Teacher_though/as_he_is,_he can't know everything.

　　6．威尼斯的美很大程度上在于它那古代建筑的风格。

　　The beauty of Venice consists largely in the style of its ancient buildings.

　　7．这座正在建设的房子是打算用作餐厅的。

　　The house being built now is_intended_for/to_be a dinning hall.

　　8．她所说的远非是这个孩子所能听懂的。

　　What she said is far_from_what the child could understand.

　　9．他白费力气想抓住停在花上的蝴蝶。

　　He tried in_vain to catch the butterfly on the flower.

　　10．他主动为我们俩付钱，真是大方。

　　It_was_generous_of_him_to_offer to pay for us both.

　　二、勤练语篇阅读，多练自能生巧

　　Ⅰ.完形填空

　　It was Mother's Day, Sunday in 1970. My family and I were at the __1__ when I looked around noticing our 12­year­old son was __2__. My wife and I looked at each other with questioning __3__， thinking he was __4__ outside playing with his friends.

　　Since we only lived about a block from the church, __5__ the sermon (布道) I was thinking he had gone home to watch television. I __6__ that when I found him, he would not either be able to __7__ for a week or be allowed to watch television. I knew in my heart that I would __8__ him to know what was important and what was not.

As soon as the sermon was over, my wife and I __9__ for the door and on our way home.