— Why is Lily so popular among students?
— Because she often ________us with help and care.
A:gives
B:offers
C:provides
D:supplies
284×30=( )
下列比赛适合在海南三亚开展的是( )
解二元一次方程组的方法有代入消元法和____ 消元法,化二元为一元.
重诺守信是诚实人的做事准则,也是衡量一个人心理成熟和文化水平高低的标尺( )