____________ the teachers is about 300 in our school and it is becoming_____________.
This is a book and ________ book is new.
---How ________ your brother? ---Fine.
It’s an________.
---What’s this? ---________.
26个字母中能够单独构成单词的两个字母是________. A. A,I B. I,N C. A.L D. A,N