问答题

At the meeting there was a hot argument and so many problems were left______.
A．to solve
B．solving
C．solved
D．unsolved

A.
A．to
B.solving
C．solved
D．unsolved

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He has left the book here______for you to read.
A．on schedule
B．on purpose
C．at random
D．at large

A.
A．on
B.on
C.at
D.at

It was sillythe mistake, which is rather difficult to.
A．of him to make; admit
B．for him to make; be admitted
C．for him to make; admit
D．of him to make; be admitted

A.
A．of
B.for
C.for
D.of