题目内容

---The boy has to stay at home to look after his little sister,_______?---Yes, because his mother has gone shopping.

A. does he
B. is he
C. doesn’t he
D. hasn’t he

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----____________?---The one behind the tree.

A. Whose girl
B. Who’s that girl
C. Which girl
D. Where’s the girl

______the population of china?

A. How many
B. How much
C. How’s
D. What’s

特别是（）纪地层，绝大部分都是变质岩，世界大部分铁矿都储存于此。

A. 奥陶
B. 侏罗
C. 前寒武
D. 第四纪

（）岩形成的变质岩叫正变质岩；（）岩形成的变质岩叫副变质岩；

A. 火成岩；沉积岩
B. 沉积岩；火成岩
C. 石灰岩；安山岩
D. 砂岩；金伯利岩