摘要： –Did you ask the guard what happened? --Yes, he told me all he knew. A. about which B. which C. that D. what
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–Did you ask the guard what happened?
--Yes, he told me all ______ he knew.
| A．about which | B．which | C．that | D．what |
–Did you ask the guard what happened?
--Yes, he told me all ______ he knew.
A. about which B. which C. that D. what
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-Did you ask the guard what happened?
-Yes, he told me all ______ he knew.
- A.about which
- B.which
- C.that
- D.what