题目内容
________ everybody is here, let’s begin our meeting.
A. Though B. Since C. Unless D. While
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19.-Whose notebook is this?
-It ______ be Tom's.It has his name on it.( )
-It ______ be Tom's.It has his name on it.( )
| A. | must | B. | may | C. | might | D. | can't |