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【简答题】
某元素的原子最外层有5个电子,它的最高价氧化物对应的水化物是强酸,它的气态氢化物是易溶于具有刺激性气味的气体。该元素是 。
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举一反三
【简答题】It's a pity that he didn't come earlier．
【单选题】'You know so much about literature. It's a pity you failed your degree,' Harry said, 'You ______ a good teacher.'
A.
would have been
B.
can have been
C.
must be
D.
should have been
【单选题】B: It's a pity, but
A.
how can I lessen my loss?
B.
how can I minimize my loss?
C.
could you tell me how to minimize my loss?
【简答题】It's a pity that she didn't attend that important meeting. It's a pity that she____________that important meeting.
【单选题】It's a pity that you ______ leave so soon. It's been so nice having you here.
A.
should
B.
could
C.
can
D.
might
【单选题】It's a pity that you ______ leave so soon. It's been so nice having you here.
A.
can
B.
could
C.
should
D.
might
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