Question

Where is you sister?she ( ) be in the reading room.She likes reading very much.

A can B must C need Dhave to
给我解题思路，谢谢

Answer 1

选B
1.因为must除了有“必须”的意思外，还可以表示猜测。
she must be in the reading room. 她应该在阅览室里。（表推测，因为后问题到她喜欢阅读，作为推测的根据。）

2.而其他3项与题目意思不符
“can”也可表示推测，但仅用于否定句中，表示“不可能”。eg：She can't be in the reading room because she doesn't like reading.
“need”意为需要做某事；“Have to”意为必须做某事，与题意不符

Answer 2

must She likes reading very much.可以肯定她必定在阅览室里
must 在所有的情态动词里语气最强

Answer 3

B肯定性推测。因为后边肯定了she likes reading very much.A、C、D连语法都不对。

Answer 4

B 。must表示非常肯定的推测和判断

Answer 5

B
对对方很了解 MUST BE 表肯定！

Answer 6

B