题目内容
____ I'm mistaken, I've seen that tall man at a party before.
| A．If | B．As | C．Unless | D．When |
C
解析试题分析：句意：如果我没有认错的话，我以前在聚会上见过那个人。这里用unless引导条件状语从句，意思是“除非，如果不”，if引导条件状语从句，意思是“如果”，As“正如，因为，随着”，when“当…时候”，引导时间状语从句。所以选C。
考点：考查连词辨析
开心蛙状元测试卷系列答案On Christmas Eve, children are eager to know _______Father Christmas comes and puts presents into their stockings．
| A．that | B．what | C．where | D．how |
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| A．since | B．if | C．as | D．while |
______ the ancient Egyptians built the pyramids puzzled people for centuries.
| A．Whether | B．What | C．How | D．Where |
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| A．Since | B．Although | C．Because | D．Unless |
It is uncertain side effect the medicine will bring about , though about one thousand patients have taken it.
| A．that | B．whether | C．what | D．how |
_______ I’m not sure of winning the match, I will have a try anyway.
| A．While | B．Before | C．Once | D．Since |
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| A．in case | B．so that | C．in order | D．as if |
—Someone wants you on the phone.
—________ nobody knows I am here.
| A．Although | B．And |
| C．But | D．So |