初一英语用所给的适当形式填空!求答案和理由
II.用所给词适当形式完成句子
1.Treesareimportantinour_____________(day)lives.
2.Thereare___________(many)peopleinthishallthanthatone.
3.Weallknowthatsmokingis____________(harm)toourhealth.
4.Airisamixture(混合物)of____________(gas).
5.MrGreenlivesina______________(convenience)life.
6.Timhasbeenafire____________(fight)forfiveyears.
7.Look!_____________(child)arehavingfunthere.
8.Weshould______________(discussion)theproblemnow.
9.Ican’t______________(imagination)aworldwithoutlove.
10.____________(leaf)turnyellowandfalldowninautumn.
11.Wehavetostop____________(pollute)theearth.
12.Treesare______________(use)forourhuman.