Susan decided not to work on the program at home because she didn’t want her parents to know what she______ .
| A．has done | B．was doing | C．had done | D．is doing |
69. With the guide leading the way, the visitors were able to travel through the forest not by air but _____ foot.
| A．by | B．on | C．in | D．with |
68. When the boy playing by the river fell into the river, I was out of the room _______.
| A．in flash | B．in a flash | C．as a flash | D．for a flash |
67. The Prime Minister was more fit __________ his office than anyone else.
| A．for | B．to | C．with | D．Of |
66. When the good news that our football team won the championship, the hall was at once _______ great joy.
| A．filled of | B．full with | C．filled with | D．fill with |
65. Two dogs ______ a bone, and a third runs away with it.
| A．fight back | B．fight with | C．fight against | D．fight for |