找出与其它三个不同的一项，将其字母填入题前的括号中。
（1）A. train B. plane C. go D. ship
（2）A. usually B. what C. sometimes D. often
（3）A.library B. traffic C.hospital D.bookstore
（4）A. what B. who C. where D. white
（5）A. morning B. tonight C. tomorrow D. Straight