题目：
选择表达正确的句子。
( ) 1. A. She is putting her pencils in her pencil case.
B. She is put her pencils in her pencil case.
( ) 2. A. He reading a book.
B. He is reading a book.
( ) 3. A. Where is Mr. Wood?
B. Where are Mr. Wood?
( ) 4. A. He is in library.
B. He is in the library.
答案：
答案：A
