41. Jean did not have time to go to the concert last night because she was busy _C_ for her examination.
A to prepare B to be prepared C preparing D being prepared
be busy doing sth. 忙於做某事
42. Five minutes earlier， _A_ we could have caught the last train.
A and B but C or D an order
and 在這裡表示一種結果，翻譯成 那麼 。只有兩種情況下and才會這樣翻譯：1. 省略句 + and + 句子; 2. 祈使句 + and + 句子。
43. Turn on the television or open a magazine and you _B_ advertisements showing happy balanced families.
A are often seeing B will often see C often see D have often seen
44. I cannot give you _D_ for the type of car you sell because there is no demand for it in the market.
A an expense B a charge C a purchase D an order
order n. 定購，訂單; purchase n. 購買。
45. By the end of this month， we surely _C_ a satisfactory solution to the problem.
A have found B will be finding C will have found D are finding
如果一個句子的時間狀語是由by引導的.，則時態要選擇完成時態。將來的行為在將來的某個時間之前就已完成用將來完成時。solution to a problem 一個問題的解決方案。
