..---You haven't said one word about the design, Joe. What's your idea?
---Sorry. I________about something else.
| A．thought | B．am thinking |
| C．was thinking | D．had thought |
— You’ve made great progress in your studies of English, haven’t you?
—Yes, but much _______.
| A．remains to do |
| B．is remained to do |
| C．remains to be done |
| D．is remained to be done |
The soldiers tried their best and did what they could _______ against the flood.
| A．fight | B．to fight |
| C．fighting | D．fought |
_______ for the breakdown of the school computer network,Alice was in low spirits.
| A．Blaming | B．Blamed |
| C．To blame | D．To be blamed |
Helen had to shout _______ above the sound of the music.
| A．making herself hear |
| B．to make herself hear |
| C．making herself heard |
| D．to make herself heard |
Just then,another man, _______ behind the first,spoke up，“Who are you?”.
| A．sitting | B．to sit |
| C．sat | D．having sat |