下列每组单词中有一个是不同类，选出这个词（共10小题；每小题1分，满分10分）
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—_______ are you going to visit the science museum?
—Next Saturday.
| A．When | B．What | C．Where | D．How |
I want to buy some postcards in the shop, _______ I don’t have enough money.
| A．and | B．but | C．or | D．so |
My mother always gets up _______ 6 o’clock in the morning.
| A．at | B．on | C．in | D．to |
Mike is my good friend. He often helps _______ with my English.
| A．I | B．me | C．my | D．mine |
—Jimstudy hard these days?
—Yes, he will (将) take an exam (考试) next week.
| A．Is, have to | B．Does, have to | C．Can, have to | D．Does, has to |