— What does your father think of your school report this term?
—The smile on his face shows that he is_______ with what I've done.
A：strict
B：pleased
C：busy
All of us are worried _____ the coming exam
资源和环境问题都是由于人口增长过快造成的．（判断对错）
已知5个正数a1，a2，a3，a4，a5的平均数是a，且a1＞a2＞a3＞a4＞a5，则数据：a1，a2，a3，0，a4，a5的平均数和中位数是（ ）
写出近义词
仰着—____ 干净—____ 狡猾—____
