The public transportation in this city is very convenient, where many buses run ______.
| A．occasionally | B．approximately | C．immediately | D．frequently |
The living room is clean and tidy, with a dining table already ______ for a meal to be cooked.
| A．laid | B．laying | C．to lay | D．being laid |
Anyway, I can’t cheat him---it’s against all my _______.
| A．emotions | B．principles | C．regulations | D．opinions |
We live in an age _____ more information is available with greater ease than ever before.
| A．why | B．when | C．to whom | D．on which |
I think Tom, as the head of a big department, should either study regularly or ____his job.
| A．quits | B．to quit | C．quitting | D．quit |
Your _____ as a student will be excellent if you develop a habit of reflecting on how you learn.
| A．operation | B．growth | C．performance | D．character |