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一. 选择最佳答案(表示时间关系的介词).1. The plane arrived at London airport ______ Wednesday.
A. on
B. at
C. in
D. for
2. What do you usually do ________ Christmas?
A. on
B. at
C. in
D. for
3. Mrs. Brown worded in the west of Australia ________ last summer?
A. /
B. on
C. in
D. since
4. The first class begins _______ 8 o’clock ______ the morning.
A. at/on
B. at/in
C. on /in
D. on/on
5. _______the past two months, he has been busy with his school work.
A. For
B. On
C. Since
D. At
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