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【单选题】
Which of the element below contributes the most to the Earth’s mass?A.
silicon
B.
alumina
C.
iron
D.
megnesium
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【简答题】人体蛋白质的基本组成单位是______________,共有几____________种.
【简答题】Lily: Hello! 11 Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: 12 Billy: I’m not quite sure. Probably sometime tonight. 13 Lily: Yes, that would be great. Please ask her if I can ...
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A.
No, she is
B.
Yes, this is
C.
Yes, she is
D.
No, it isn’t
【简答题】Lily: Hello! ________ Is Sue there? Billy: I’m sorry, Lily. Sue isn’t in right now. Lily: ________ Billy: I’m not quite sure. Probably sometime tonight. ________ Lily: Yes, that would be great. Please...
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A.
Yes, that would be great.
B.
You’re welcome.
C.
This is Lily speaking.
D.
Would you like me to give her a message?
E.
Do you know when she will be back?
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