— _____! How exciting!

A. Oh, cool　　　　　　　　   B. Don’t be afraid

C. Don’t worry　　　　　　   D. Be careful

　　　 在下面对话的空白处填入适当的单词，使对话的意思完整、通顺，每空限填一词（含缩写词）。

(Mrs. Cook arrives home after shopping for food.)

Walter: Mom, I can’t find my eraser.

Mrs. Cook: Again? That’s the fourth (71)　　 this month! Have you checked your pencil box?

Walter: Yes, but it’s not there.

Mrs. Cook: Did you look (72)　　 in your room?

Walter: Yes, I did.

Mrs. Cook: How about the living room?

Walter: It (73)　　 be there. I was doing my homework in my room and didn’t even go into the living room.

Mrs. Cook: Well, then, borrow one from your brother for now. I’ll (74)　　 you find it after I put all the food in the refrigerator.

Walter: OK.

Mrs. Cook: Walter! Look what I’ve (75)　　　 .

Walter: My eraser! Oh, I remember! I got some juice from the refrigerator, and...and....

Mrs. Gook: And put the eraser in the refrigerator.

Walter: Well, I don’t remember that part.

Mrs. Cook: Well, take it, and be more careful next time.

---I’m sorry I forgot　　 the letter for you!　

---It doesn’t matter, I’ll post it myself.

A. to post　　 B. posting　　 C. post　　 D. posted

I ______ go out, but I _________ be home by ten o’clock.

　　　 A. mustn’t, can　　 B. can’t, have to C. have to, can D. can, have to