下列各组词语中有错别字的一组是 ( ) A．竞秀浑浑噩噩

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问题选择题

下列各组词语中有错别字的一组是 ( )

A．竞秀浑浑噩噩浑然天成牛头不对马嘴

B．狙击若即若离勇气可佳天网恢恢疏而不漏

C．捡漏娇小玲珑缴枪投降天下乌鸦一般黑

D．亢旱百废具兴严刑峻法无源之水无本之木

答案

答案：B

(佳一嘉)

填空题

用括号内所给动词的适当形式填空。

1. Let's have a dictation (听写). ________ (take) out your exercise books.

2. After eating, I help my mom ________ (do)the dishes.

3. My brother often asks me ________ (sweep) the floor.

4. The computer programmer is going _______ (work) on a new program.

5. The girl is old enough _______ (make) her bed.

填空题

若3x ^m-5y²与x³yⁿ的和是单项式，则mⁿ=（）。