Fill in can, can't, must, mustn't, needn't or have to.
1 A: Is Matthew very rich?
B: He ...must... be. He drives a Ferrari.
2 A: Would you like to come shopping with me?
B: Yes, but I … . I … do my homework this afternoon.
3 A: Is Tom interested in music?
B: Oh yes. He … play the guitar and the saxophone.
4 A: Is Katie at home?

B: No, she … be. Her car is not here.
5 A: Can I go to the cinema tonight?
B: Yes, but you … be late home.
6 A: Hurry up. You'll be late for school!
B: I don't … go to school today. It's Saturday.
7 A: I bought you this present.
B: Oh, you … have. It's not my birthday!
8 A: Excuse me, I'm looking for Barkwest Bank.
B: I'm afraid I … help you. I don't live here.

1 A: Is Matthew very rich?
B: He must be. He drives a Ferrari.

The word "must" is used here to express a strong opinion or assumption. Based on the fact that Matthew drives a Ferrari, it is assumed that he is very rich. This is a logical deduction, but not a definite fact.

2 A: Would you like to come shopping with me?
B: Yes, but I must do my homework this afternoon.

In this sentence, "must" is used to express obligation or necessity. The person wants to come shopping, but they have to do their homework because it is necessary for them to do it this afternoon.

3 A: Is Tom interested in music?
B: Oh yes. He can play the guitar and the saxophone.

Here, "can" is used to indicate ability. Tom has the ability to play both the guitar and the saxophone, showing his interest in music.

4 A: Is Katie at home?
B: No, she mustn't be. Her car is not here.

"Mustn't" is used in this sentence to express a deduction or conclusion based on evidence. The fact that Katie's car is not here leads to the conclusion that she is not at home.

5 A: Can I go to the cinema tonight?
B: Yes, but you have to be late home.

In this sentence, "have to" is used to express obligation or requirement. The person can go to the cinema, but they are required to be home late.

6 A: Hurry up. You'll be late for school!
B: I don't have to go to school today. It's Saturday.

In this case, "don't have to" is used to indicate the absence of obligation. It is not necessary for the person to go to school because it is Saturday.

7 A: I bought you this present.
B: Oh, you needn't have. It's not my birthday!

"Needn't have" indicates unnecessary past action. The person is saying that the other person didn't need to buy them a present because it is not their birthday.

8 A: Excuse me, I'm looking for Barkwest Bank.
B: I'm afraid I can't help you. I don't live here.

"Can't" is used to express inability. The person is saying that they are unable to help because they do not live in that area and are unfamiliar with the location of Barkwest Bank.