pets一级考试单项填空的模拟题
When the little girl stood in the front of the classroom, her face________red.
A.turns
B.tumed
C.turn
参考答案：B
参考解析：B【解析】本题考查主从句时态一致。when引导的时问状语从句是一般过去时，若主句动词是短暂性动词，那么该动词也要用一般过去时。
Not until I began to work ________ how much time I had wasted.
A. didn t realize
B.did I realize
C.1 didn t realize
参考答案：B
参考解析：B【解析】本题考查句子的.部分倒装结构。当not…until置于句首时，句子要使用部分倒装，即将谓语的一部分如助动词或情态动词放在主语之前。如果句中的谓语没有助动词或情态动词，则需添加助动词d0，does或did，并将其置于主语之前。本句正常语序为：I didn’t realize how much time I had wasted until I began to work.
I ________go there this morning, so I stayed at home.
A.didn t need to
B.didn t need
C.needn t to
参考答案：A
参考解析：A【解析】本题考查情态动词的用法。need作情态动词用时，是need do sth./needn’t do sth.;need作实意动词用时，是need to do sth./not need to do sth.
It ________ heavily so there was deep snow on the road.
A.snows
B.snowed
C.had snowed
参考答案：C
参考解析：C【解析】本题考查动词时态。there was是过去式，so表示结果，所以空白处要用过去完成时，表示“过去的过去”。
My little sister is only five, ________ she can swim well.
A.but
B.so
C.because
参考答案：A
参考解析：
The books on the desk are not mine; they re __
A.him
B.theirs
C.their
参考答案：B
参考解析：B【解析】本题考查名词性物主代词。本句中名词性物主代词theirs (=their books)作表语。
Lily went to see her grandpa yesterday __ he was ill.
A.if
B.though
C.because
参考答案：C
参考解析：C【解析】本题考查连词的用法。根据上下文町知.这里填表示因果关系的连词，全旬才符合逻辑。
He drives much ________ than he did ten years ago.
A.carefully
B.more careful
C.more carefully
参考答案：C
参考解析：C【解析】本题考查副词比较级。这里需要一个副词来修饰动词drive，careful是形容词，carefully是副词，所以先排除B;than要求用比较级，所以排除A，选C。carefully的比较级是在前面加more。
--Do you speak English?
--yes, only________
A.fittle
B.a few
C.a little
参考答案：C
参考解析：C【解析】本题考查近义词辨析。little和a little都修饰不可数名词;little表示否定含义，“几乎没有”;a little表示肯定含义，“有一点儿”。few和a few都修饰可数名词;few表示否定含义，“几乎没有”;a few表示肯定含义，“有一点儿”。
The rain was very __ yesterday.
A.large
B.strong
C.heavy
参考答案：C
参考解析：C【解析】本题考查近义词辨析。形容雨大用heavy，形容风大用strong。
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