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a strange plant! I've never seen it before.
A. Which B. What C. How D. Whether
________a strange plant! I've never seen it before.
A．Which
B．What
C．How
D．Whether
_____ a strange plant! I've never seen it before.
_____ a strange plant! I’ve never seen it before.（ ）
_________ a strange plant! I've never seen it before．