一段方钢，长2.5米，横截面是边长6厘米的正方形．这段钢材有多重？（每立方分米钢重7.8千克）

根据句意用括号中单词的适当形式填空，使句子的意思完整、正确。

小题1:Which do you like __________ of all the subjects?(well)

小题2:There are many tall _____________ in our city.（build）

小题3:I am in the _________(read) Club at school.

小题4:How many ________(play) are there in a football match?

小题5:How often does your school have a _____________ meeting?(parent)