57. 金属有许多有用的特性 , 其中强度是最重要的。

43.What did the young man usually have at a restaurant ？

32.He apologized_having to leave so early.

60. 浇完花园 , 他开始割草坪。

24.There is no doubt _ he is a good employee, for he has all the qualities that the company needs.

40.What is the main idea of the passage ？

42.The young man was not found to be illiterate until_.

33.She missed the train because she had been_the traffic jam.

34.I must decline it because the conditions you offered are not_.

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45.Why did the young man like to go to Howard Johnson’s ？

20._suggestions you make, he will turn a deaf ear to them.