You should take a break from time to time. Otherwise, you will soon ______ if you go on working like that.

下列词语中，没有错别字的一组是（    ）

看拼音写词语。

gǎi  guān	yī  lài	jì  tuō	lián  xì	miáo  huì
____	____	____	____	____

补全下面的短文。
    Last Friday，John went on a school trip with his classmates．They____the science museum．John learned a lot about robots．Some of them____sing and dance．They were so cool John____lots of photos there．After that，he went to the gift shop and____some lovely gifts for his parents．They____cheap．

下列物质中，碱性最强的是