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【单选题】
按照《建筑基坑支护技术规程》(JGJ120-99)，钢筋混凝土拱墙结构的混凝土强度等级不宜低于( )。A.
C25
B.
C20
C.
C30
D.
C15
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【简答题】看图，填空。 Hello, I'm Sarah. What's your ______________ (名字)? ______________ name's Bei Bei. I'm a ______________ (黑色的) dog. ______________ ______________ Mimi. I'm a ______________ (白色的) cat.
【简答题】What happened to the man?
【单选题】What ____ to him yesterday? [ ]
A.
had happened
B.
happen
C.
happened
D.
was happened
【简答题】What happened?
【单选题】—_____last night? —A car hit a tree. [ ]
A.
What happens
B.
What was happened
C.
What happened
【单选题】Could you please tell me ______ just now? [ ]
A.
what's happened
B.
what's happening
C.
what happened
D.
what was happened
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