The girl looked at me with a ______expression. Maybe the problem was quite _____.
| A．puzzling; puzzling | B．puzzling; puzzled |
| C．puzzled; puzzled | D．puzzled; puzzling |
（届河南省郑州市第四中学高三上学期第六次调考）
Tony ________ full marks, but he was so careless as to make a spelling mistake.
| A．could have gained | B．can have gained |
| C．must have gained | D．must gain |
（届江西省赣州市六校高三上学期期末联考）
We used to work in the same office and we ________ have coffee together.
| A．should | B．would | C．could | D．might |
（届四川省绵阳市高中高三第二次诊断性考试）
Our teachers often suggest we ______ take it easy when facing any difficulty.
| A．had | B．could | C．would | D．should |
（届福建省漳州市芗城中学高三12月第四次月考）
The petrol tank is empty. I _________it up before we left home.
| A．had to fill | B．would have filled |
| C．should have filled | D．could have filled |
（届湖南省衡阳市八中高三第六次月考试卷
The politician has been warned that he would be getting into great trouble ____ stick to his standpoint.
| A．were he to | B．he will | C．he was to | D．would he |