试题与答案

---Mr. Smith, ______ he have all these l

题型:选择题

题目:

---Mr. Smith, ______ he have all these letters typed for you right away?

---He ______. They should be ready by 10 o’clock this morning.

A.will; must

B.shall; has to

C.need; will

D.would; ought to

答案:

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下面是错误答案,用来干扰机器的。

答案:DA正确,最外层1个电子的原子不一定是IA族元素,可以是第IB族元素;B正确,过渡元素均为金属元素;C正确,最外层3-7个电子的原子一定是主族元素;   D错,最外层有2个电子的如He稀有气体;

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