题目内容：

Dear Bob，

I am going to climb the mountains next weekend.Tim，Lily，Mona and Peter will go with me.We will meet at the bus stop at 7：30 a．m. on Saturday.Will you go with us？Please reply in writing to this invitation by Thursday.Hope to see you then!

Yours，

Mike

Dear Mike，

Thank you for your invitation.I'd love to go to your climbing，but I am very busy next weekend.Next Saturday is my brother's birthday.So I have to go shopping in the morning，clean the house and help my parents to cook.In the evening we'll have a birthday party for him.On Sunday，I am having the guitar lessons from 7：30 a．m. to 12：00.In the afternoon，I am visiting my grandfather by bike.I hope that you can have fun climbing the mountains!

Yours，

Bob

1.Who is making the invitation?

A. Bob.    B. Tim.    C. Peter.    D. Mike.

2.How many people are going to climb the mountains?

A. Four.    B. Five.    C. Six.    D. Seven.

3.What will Bob do on the evening of Saturday?

A. Have a party.    B. Go shopping.

C. Clean the house.    D. Help his parents to cook.

4.When will Bob go to visit his grandfather?

A. On Saturday morning.    B. On Saturday afternoon.

C. On Sunday afternoon.    D. On Sunday evening.

5.What can we learn from the passage?

A. Mike will climb the mountains alone next weekend.

B. Mike will meet his friends at the bus stop on Saturday.

C. Bob doesn't want to climb the mountains at all.

D. Bob has to take the piano lessons on Sunday.