根据所提供的情景选择适当的句子。
（ ）（1）你想知道对方姓名，应说_
A.My name is Han Mel. B. What's your name?C. Hello.
（ ）（2）早上遇见刘老师，应说_
A.Thank you，Mr. Li.B.How?C.Good morning，Mr. Liu.
（ ）（3）别人向你打招呼 Hello!你应说_
A.What's your name?B.Hello!C.Thank you.
（ ）（4）假如你叫林峰，当有人问你What's your name?时，你应回答_____.
A.I'm fine，tooB.Nice to meet vonC.My name is Lin Feng.
（ ）（5）见到客人站着，你应说，
A.Sit down.please.B.How are you?C.I'm fine，too.
（ ）（6）下午与同学见面，你应说____
A.Good afternoon. B.What's your name? C.How are you
（ ）（7）晚上分手时所用礼貌用语是：
A.Hi! B。Hello!C.Good night!
（ ）（8）当经介绍后认识某人，你应该说：
A. Good morningB. Please sit down.
C. Thank you.D. Nice to meet you.
（ ）（9）上课铃响了，教师走进教室，班长应该说：
A.Please come in.B.Good morningC.Stand up.
（ ）（10）想知道对方的年龄，应怎样问?
A.How old are you B.How are you C.How do you do.
When is World Environment Day?
It’s ___________.
A.on 10th September B.on 5th June C.on 22nd April
Look, Sam is starting a poster.
A.makes B.to make C.make
Plastic bagsthe park messy and dirty.
A. make B. makes C.making
To keep the air clean,don’tto work every day.
A. walk B. ride C. drive
Weplasticbags and bottles.
A. use,make B.to use,to make C. use,to make