.A computer is so useful a machine ________ we can use everywhere.A．thatB．whichC
题型：不详难度：来源：
| .A computer is so useful a machine ________ we can use everywhere. |
答案
| C |
解析
| 本题考查句子结构和关系代词的选用。首先表示认清句子结构，use后面应该接一个及物动词，先行词应该充当宾语，而前面出现so useful不能用that与which来修饰，可以排除。另外，what 不能引导定语从句。 |
举一反三
Mother made a promise ____ I passed the college entrance examination she would buy me a mobile phone.| A．that | B．if that | C．that if | D．that whether |
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| Everything depends on ________ we have enough time. |
―I’ve already made up my mind.
―________, there’s no point discussing it now.| A．In case | B．In that case | | C．On the case | D．As the case may be |
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4 You will succeed in the end ____ you give up halfway. | A．even if | B．as though | C．as long as | D．unless |
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5. “Was his father very strict with him when he was at school?” “Yes. He had never praised him _______ he became one of the top students in his grade.” | A．after | B．unless | C．until | D．when |
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