题目内容
18. It was because of English girlfriend, believe it or not, ______ his English improved so greatly.
| A.which | B.as | C.that | D.what |
C
为强调句型,被强调成分为 because of English girlfriend。由于句中插入了believe it or not这一成分,致使许多同学误认为这是一个非限制性定语从句。
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