let's make a effort to protect our environment

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• we are the world .we are ones who make a brighter day .so let's start giving .there's a choice we're saving our own live
• Let's work hard ——（一起）to make our country mor
• Let's ( ) a birthday card for our mother?括号里填make 还是makeing?
• it's our duty to protect our environment/是什么意思请问
• it's our duty to help ____(protect)the environment
• It's our duty to make a contribution to______(protect) the environment. 括号中应填什么形式?为什么?
• 1.'Let's buy some yeast and make our own bread,'said Mary.2.'Let us help him carry the piano.改为间接引语!
• ( )5.Welcome to our school.Let me___you____each other.A.to introduce;to B.introduce;to C.ask;to D.get;to( )6.He went back____that the door was closed.A.making sure B.to make sure of C.to make sure about D.to make sure( )7.She thanked me and____the gift.A.accept B.accepted C.receiving D.received( )8.I received my friend's letter last week,but I didn't____immediately.A.agree B.answer to C.reply D.reply to
• 求几道初中英语首字母填空及完成句子的答案1.Do you know other s____ of China besidesthe Great Wall?2.Hearing the exciting news,the boys jumped with e_____.3.How long has the computer been in s____ till now?4.The changes have brought us lots of a_____ but have also caused problems.5.We should r_____ the pollution to protect our environment.6.The air is f_____ in the country than in the city.
• 帮忙看看这句英语有没有错It’s our DUTY to Protect Environment!Not only begin with Forests,but also with other Resources!
• 他现在很累为什么是He is tired now.而不是He is being tired now.
• 若不等式x2+ax+1≥0对于一切x∈（0，12）成立，则a的取值范围是（　　） A.a≤-2 B.a≤-52 C.a≥−52 D.a≥2