The students worked in groups to ________ the difficult problem in the math class.
work out
turn down
cut off
worry about
There is ________“s” and ________“f”in the word “useful” .
单词辨音在四个选项中找出一个读音与其他三个不同的单词。(本大题共5分)
Do you have _______ chicken _______ beef?
Last Sunday, Uncle Wang _______ us _______ his home town.
English will help us ______ in our work and study.