单项选择题

Peter had no idea how long will he spend there he got the order,

A. while
B. until
C. after
D. when
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单项选择题
The numbers of students of each class range ______ 10 to 20.
A. with
B. from
C. up
D. about
单项选择题
I'll consider ______ my grandma tomorrow morning, but I'm not sure if she is at home at that time.
A. visiting
B. visit
C. visited
D. to visit
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