All the students are seated in the classroom, actually good at their study, listening attentively.
| A．most of whom | B．most of who | C．most of them | D．most of which |
A good friend of mine from（） I was born showed up at my home right before I left for Beijing.
| A． | how | B． | whom | C． | when | D． | which |
-- Could you be so kind as to close the window?
-----__________________.
| A．With pleasure | B．Go ahead | C．Yes, please | D．That's OK |
Just as Professor Scotti often______ it, success is ninety-nine percent mental attitude.
| A．gets | B．makes | C．puts | D．means |
-- Do you think it's a good idea to make friends with your students?
-- _____ , I do. I think it's a great idea.
| A．Really | B．Obviously | C．Actually | D．Generally |
- I wonder how much you charge for your services.
-- The first two are freethe third costs $30.
| A． | while | B． | until | C． | when | D． | before |