题目内容
If the boy had _____ the dog alone it wouldn't have bitten him.
| A.set | B.left | C.had | D.put |
B. left.
leave sb./sth. alone不惹,不管,不碰:Leave the box alone.(别碰那个盒子。)
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| A.set | B.left | C.had | D.put |