Being a teacher, you must observe your behavior, for ________ you say and do has a life-long effect on your students.
| A．that | B．which | C．what | D．as |
This is the reason ______he didn't come to the meeting.
| A．in which | B．with which | C．that | D．for which |
The way ______he looks at problems is wrong.
| A．which | B．whose | C．what | D．/ |
I can never forget the day _______ we worked together and the day ______ we spent together.
| A．when; which | B．which; when | C．what; that | D．on which; when |
I have bought such a watch _______ was advertised on TV.
| A．that | B．which | C．as | D．it |
Last summer we visited the West Lake, ______Hangzhou is famous in the world.
| A．for which | B．for that | C．in which | D．what |