单项选择题

My brother （） while he （） his bicycle and hurt himself.

A. fell ; was riding
B. fell ; were riding
C. had fallen ; rode
D. had fallen ; was riding

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单项选择题

A. when did you get back
B. What a surprise I got
C. How I admire you
D. I am Tom
E. got hold of
F. got through
G. this is Tom
H. tried to contact you

单项选择题

56（）

A. when did you get back
B. What a surprise I got
C. How I admire you
D. I am Tom
E. got hold of
F. got through
G. this is Tom
H. tried to contact you