How I wish I__________ this terrible thing, but it is too late.
| A．had not done | B．didn't do |
| C．wouldn't do | D．might have done |
I told him what I was surprised____________ his attitude towards his study.
| A．is | B．was | C．at is | D．at was |
The visiting Minister expressed his satisfaction with his talk,__________ that he had enjoyed his stay here.
| A．having added | B．to add | C．adding | D．added |
I just don't understand_______ that prevents so many Americans from being as happy as one might expect.
| A．why it does | B．what it does | C．what it is | D．why it is |
The fire started in the basement and quickly____________ to the first floor where it destroyed all the______________ in the language lab.
| A．was spreaded;furniture and equipments | B．was spreaded ;furniture and equipment |
| C．spread;furnitures and equipments | D．spread ;furniture and equipment |
Mary ___________to see you．She．_________ for you downstairs at the moment．
| A．has come；is waiting | B．came；is waiting |
| C．has come；waited | D．came；was waiting |