It has come to my notice _______ some of you have missed classes.
| A．what | B．which |
| C．that | D．when |
-What do you think of his opinion?
-None has given me ________ piece of advice，so I will never take it.
| A．a better | B．the better | C．a worse | D．the worse |
If you keep on, you will succeed ________.
| A．in time | B．at one time | C．at the same time | D．on time |
Everyone knows that________ is dangerous to play with fire, but________ is difficult is to prevent children from playing with fire.
| A．it; it | B．what; what | C．what; it | D．it; what |
—Thank you very much.
—It’s a piece of cake compared to your saving my life: I am forever ______.
| A．in your debt | B．in debt | C．getting into debt | D．remembering you |
—Why are you so disappointed?
—I went there hurriedly and waited there for 3 hours, ______ the tickets have been sold out.
| A．being told | B．only to tell | C．telling | D．only to be told |