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【单选题】
— Have you ever been to Shanghai? — Yes. I there with my father last year.
A.
went
B.
have been
C.
have gone
D.
has been
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参考答案:
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【单选题】We should clean everyday .
A.
our tooth
B.
our tooths
C.
our teeth
D.
teeth
【单选题】到期一次还本付息还款方式一般用于期限在 年以内的个人贷款
A.
10
B.
5
C.
3
D.
1
【单选题】1999年真题 生物碱分子中氮原子杂化方式与其碱性强弱的关系是
A.
SP>SP2>SP3
B.
SP>SP3>SP2
C.
SP3>SP2>SP
D.
SP3>SP>SP2
E.
SP2>SP3>SP
【单选题】生物碱分子中氮原子杂化方式与其碱性强弱的关系是
A.
sp>sp2>sp3
B.
Sp>sp3>sp2
C.
Sp3>sp2>sp
D.
Sp3>sp>sp2
E.
Sp2>sp3>sp
【单选题】We should clean ______ twice a day.
A.
our tooth    
B.
our tooths      
C.
our teeth        
D.
teeth
【简答题】生物碱分子中氮原子杂化方式与其碱性强弱的关系是: > > 。
【单选题】we should keep our- clean.
A.
teeth
B.
tooth
C.
tooths
D.
toothes
【单选题】We should keep our clean.
A.
tooth
B.
tooths
C.
toothes
D.
teeth
【单选题】We should keep our clean.
A.
toothes
B.
tooths
C.
teeths
D.
teeth
【简答题】We should keep our surroundings clean.
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