1.The ground is riddled with ice wedges,many quite ancient,caused (by the cold earth cracks) and the cracks filled with water.A.by the cold earth cracking B.when the cold earth cracks.括号内为啥选B不选A?and不是应该并列两个名词嘛?2.

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1.The ground is riddled with ice wedges,many quite ancient,caused (by the cold earth cracks) and the cracks filled with water.A.by the cold earth cracking B.when the cold earth cracks.括号内为啥选B不选A?and不是应该并列两个名词嘛?2.
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1.The ground is riddled with ice wedges,many quite ancient,caused (by the cold earth cracks) and the cracks filled with water.A.by the cold earth cracking B.when the cold earth cracks.括号内为啥选B不选A?and不是应该并列两个名词嘛?2.
1.The ground is riddled with ice wedges,many quite ancient,caused (by the cold earth cracks) and the cracks filled with water.
A.by the cold earth cracking
B.when the cold earth cracks.
括号内为啥选B不选A?and不是应该并列两个名词嘛?
2.Bees forage for food many times a day,(they are risking being eaten)by predators.
A at the risk of being eaten
B risking them to be eaten
是不是risk of doing sth/ at the risk of doing才对?risk to do不对?

1.The ground is riddled with ice wedges,many quite ancient,caused (by the cold earth cracks) and the cracks filled with water.A.by the cold earth cracking B.when the cold earth cracks.括号内为啥选B不选A?and不是应该并列两个名词嘛?2.
个人觉得那个and不是并列两个名词的,差不多相当于有个因果关系或者先后关系在那里,因为是地裂了,然后碎片掉进了水里.
at the risk of doing sth,
risk做动词可以是risk sth /risk doing
they knew they riked being arrested.他们知道自己冒着被抓的危险

1. and 连接两个名词 (the cold earth)cracks冰冻的土块 和 cracks (filled with water)注满水的坑洞
2. 用被动式动名词(gerund)" being eaten " 来修饰 risk (risking).

第一题是平行结构哦 SAT语法很容易考的 后面没有by所以前面也不能有
第二题差不多啦讲的~

The ground is covered with An ice cream is on the ground. My classroom is on the ground floor. The ground is covered with d_____leaves(die) There is a book____on the ground There is a book____on the ground. There is () of water on the ground Look!he is l____on the ground The ground is al2ready white.翻译 怎样翻译The ground is al2ready white? 翻译 In the ground state,the principal quantum number(n) is 1. The ground is higher;the air is thinner同义句转换------- ------- the ground is,------- -------the air is 求翻译What's above the ground is more important than what's beneath the ground. It is( )hard.The ground is so white now 用this,the,floor,ground,is,UK,in,the(.,造句) The snow on the ground is one foot th--- the sun is shining ___（bright）on the ground The wallet is (on the ground)?对划线部分提问