93. The diligent student refused the help of others and insisted on working out the difficult maths problem _____.
| A．on his own | B．in his own | C．of his own | D．for his own |
__________ I went to the seaside, I picked up a great many shells.
| A．For the first time | B．At first |
| C．By the first time | D．The first time |
The reason _____ he didn’t go to the party was _______ his mother was in hospital.
| A．why; that | B．that ; that |
| C．which, that | D．why; because |
The little girl showed no anxiety before the competition. She seemed ______ for it pretty well.
| A．to prepare | B．having prepared |
| C．to be preparing | D．to have prepared |
__________ hard, and you will succeed in time..
| A．Working | B．Work | C．Worked | D．To work |
-- Hi, Grace, you look tired.
-- I'm tired. I ____________________ on my homework all day.
| A．worked | B．had worked |
| C．have been working | D．have worked |