In the forest we observed some trees ____the leaves were black with disease.
#73202
A
where
B
of which
C
in which
D
whose
推荐题目
—The meeting is about to start, yet the speaker hasn’t turned up.— No one knows ____.
#70404
A
what the matter is
B
what is the wrong
C
what is the matter
D
how matter stood
People are recycling many things which they      away in the past.
#66646
A
had thrown
B
will be throwing
C
were throwing
D
would have thrown