题目列表(包括答案和解析)
He is very old, ______ he still works very hard.
A. but B. if C. when D. as
He is very old,____ he still works very hard.
A. but B.if C.when D.as
He is very old,____ he still works very hard.
A. but B.if C.when D.as
He is very old,____ he still works very hard.
A. but B.if C.when D.as
He is very old,____ he still works very hard.
A. but B.if C.when D.as
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