1.填单词.
We should be ( careful ) about everything that we do.
2.改写句子.
I found it was difficult to use English grammar.
I found ( it ) ( difficult ) to use English grammar.
1.填单词.
We should be ( careful ) about everything that we do.
2.改写句子.
I found it was difficult to use English grammar.
I found ( it ) ( difficult ) to use English grammar.