(2013·成都一诊)Parents are doing all they ________ to help their children achieve th
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| (2013·成都一诊)Parents are doing all they ________ to help their children achieve their ambitions. |
答案
| B |
解析
| 选B 考查情态动词。句意：父母们在做他们力所能及的事来帮助他们的孩子实现他们的夙愿。完整形式为“Parents are doing all they can do to help their children achieve their ambitions.”其中they can do是定语从句，修饰先行词all; to help their children achieve their ambitions是目的状语。由于主句中出现了实义动词doing，所以省略了从句中的do。故答案为B。 |
举一反三
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(2013·皖南八校一模)I felt surprised that anyone of his intelligence ________ such an easy test.| A．might have failed | B．could have failed | | C．should have failed | D．must have failed |
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