We have been trying hard to find out the ____________of the homeless man, but without luck, no one can tell who he is.
| A．identity | B．memory |
| C．accent | D．difference |
—It’s only ten minutes’ walk; I could have got there on foot.
— Yes. A taxi _______ not at all necessary.
| A．was | B．had been | C．has been | D．is |
It was about 5 o’clock in the afternoon _______ they had their supper.
| A．that | B．what | C．before | D．when |
His suggestion made me angry, but _______.
| A．making others happy | B．to make others happy |
| C．others happy | D．his advice others happy |
_______ that he might lose his job, Peter always works extra hours to please his boss.
| A．Worrying | B．Having worried | C．Having been worried | D．Worried |
— I haven’t finished my task yet.
— You shouldn’t have watched the film last night, or you _______ it by now.
A, need have finished B. may have finished
C. should have finished D. will have finished