-Doesn’t Helen live on this street? -No. This is ______ Leon lives.(1.0)
A. which
B. where
C. that
D. what
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I doubt ______.(1.0)
A. whether he can come
B. if he can come or not
C. while he will be here
D. what will he do
There is no doubt ______ he will come soon.(1.0)
A. which
B. if
C. whether
D. that
The parallax measurement is used in survey studies to tell how far away ______.(1.0)
A. is an object distant
B. distant is an object
C. an object is distant
D. a distant object is
-Have you found your book yet? -No, I am not sure ______ I could have done with it.(1.0)
A. whether
B. where
C. when
D. what