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【单选题】
If you sit in a chair _____ a long time, your back may begin to hurt.
[ ]
A.
at
B.
in
C.
on
D.
for
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参考答案：
参考解析：
刷刷题刷刷变学霸
举一反三
【单选题】—I’m too busy_______ to my family often. —Why not call them instead?[ ]
A.
writing
B.
to write
C.
written
D.
write
【单选题】—What were you doing at six yesterday evening?— I_____ in the kitchen. [ ]
A.
cook
B.
cooked
C.
was cooking
D.
have cooked
【单选题】Let the old man _____ the bus first. [ ]
A.
get on
B.
to get up
C.
to get on
D.
getting up
【单选题】---Is this _______ ruler?---No．_______ is over there.---Is this _______ ruler?---No. _______ is over there.
A.
her; Her
B.
her; Hers
C.
hers; Hers
D.
hers; Her