题目内容
--- Do you know _____ Mr. Black’s address is.
--- He may live at No. 18 or No. 19 of Bridge Street. I'm not sure of _____.
| A.what; which | B.where; which | C.where ; what | D.what; where |
A
略
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| A.what; which | B.where; which | C.where ; what | D.what; where |