急 求解英语单选46. We'd better have the bicycle ____ immediately so Sam can use it for the spring outing. [A] repair [B] to be repairing [C] repaired [D] been repaired47. Excuse me, but it is time to have your temperature ____. [A] taking [B] to take [C] take [D] taken 48. It was in 1861 ____ the American Civil War broke out. [A] that [B] while [C] during which [D] in which49. There is little doubt ____ you'll be able to judge truth and error if you have confidence in yourself. [A] that [B] whether [C] as [D] as to50. It is a great surprise to me ____ Father changed his mind so soon. [A] why [B] that [C] how [D] because

46. We’d better have the bicycle ____ immediately so Sam can use it for the spring outing.
[A] repair [B] to be repairing [C] repaired [D] been repaired
46. C 正确。have sth. done “叫别人把某事做好”，固定搭配，done 过去分词作宾补。
47. Excuse me, but it is time to have your temperature ____.
[A] taking [B] to take [C] take [D] taken
47. D 正确。 也是 have sth. done 结构。
48. It was in 1861 ____ the American Civil War broke out.
[A] that [B] while [C] during which [D] in which
48. A 正确。这是强调句，结构是 It is/was + 被强调部分 + that(指人时可用 who) + 句子剩余部分。本句强调的是时间状语，如果改为非强调句，则是：
The American Civil War broke out in 1861.
49. There is little doubt ____ you’ll be able to judge truth and error if you have confidence in yourself.
[A] that [B] whether [C] as [D] as to
49. A 正确。固定句型：There is no doubt + that引导的同位语从句。(毫无疑问，某事怎样怎样。)这里用 little 代替 no，也是否定含义。
50. It is a great surprise to me ____ Father changed his mind so soon.
[A] why [B] that [C] how [D] because
50. B 正确。It 作形式主语，that 引导的从句作真正的主语。从意思来看，用 that 较为合适，因为这个从句所表示的内容是一个事实。