No one has _____ been able to trace the author of the poem.
| A．still | B．yet | C．already | D．just |
— My son, who is now studying at a university, uses more than 3,000 yuan a month.
— Well, tell him to be economical. After all, ______.
| A．money doesn’t grow on trees | B．the morning sun never lasts a day |
| C．light come, light go | D．penny wise, pound foolish |
After the 5-hour long journey, all the tourists were_____and desperate to have a good rest．
| A．turned out | B．given out | C．run out | D．burnt out |
---Haven’t you finished your report yet?
--- How I regret ________ the weekend _________ TV!
| A．wasting; to watch | B．to waste; to watch |
| C．to waste; watching | D．wasting; watching |
If _______, these injuries can develop into more serious problems.
| A．left untreating | B．left untreated |
| C．leaving untreated | D．are left untreated |
_____ for his mistake, the little boy could not but _____to his teacher that he was wrong.
| A．Blaming; to admit | B．Blamed; admit |
| C．To blame; admitted | D．To be blamed; admitting |