3b Complete the sentences with must, can't or may/might.

1 Sarah must be learning Spanish because she's got a Spanish text book.
2 She may be Spanish because she's only learning the language now.
3 She can't be very good at Spanish yet because her book is for beginners.
4 She must like the number 10 or it may be the number they gave her in a team.
5 She must be quite well-off because her wallet is very full and she's got a gold credit card.
6 She must have a full-time job because she's still a student.
7 She may love cats. Who knows, she might have a pet cat at home.