29．It will lead to very serious result if this matter was ______ unsolved.
| A．stayed | B．remained | C．left | D．Keeping |
I didn’t get into the two-hour quarrel; I know how it _________, though.
| A．would break out | B．has broken out | C．was breaking out | D．had broken out |
.— Sorry, I _______ to buy the book you need for you.
— Never mind. _______ it myself after school.
| A．forget; I’d rather buy | B．forgot; I’ll buy |
| C．forgot; I’m going to buy | D．forget; I’d better buy |
—Good morning. Doctor Brown’s office.
—Hello, this is Tom Smith. Could you please tell Doctor Brown I ____? My car____ start.
A.was delayed，doesn’tB. will be delayed, won’t
C. am delayed, didn’tD would delay, mustn’t
The cause he had devoted himself to __________a perfect success.
| A．proving | B．proved | C．was proved | D．has been proved |
— Have you handed in your papers?
—Yes, we have. I guess they ___________ now.
| A．have corrected | B．are corrected | C．are being corrected | D．are correcting |