_____ no rain for a long time, most of the crops in this area died from lacking water.
A. Being
B. There was
C. There be no rain
D. There having been
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Now, there is some hope of______ a settlement of the dispute.
A. there be
B. there being
C. there to be
D. being
For there ______ successful communication, there must be concentration and involvement in the debate itself by all present.
A. is
B. to be
C. will be
D. being
集料是指在混合料中起骨架和填充作用的粒料,包括( )等。
A. 碎石
B. 砾石
C. 石屑
D. 砂
属于人工填料的是( )。
A. 碎石
B. 破碎砾石
C. 机制砂
D. 河砂