Edison asked his father why the hens could hatch eggs ___he couldn’t.
| A．as | B．and | C．when | D．while |
29.Our English teacher had us all _______our names on a card.
| A．written | B．to write | C．write | D．for writing |
28.The ______ student standing at the gate speaks very good Chinese.
| A．tall young American | B．young tall American |
| C．American tall young | D．American young tall |
27.Even at the narrowest of the Pacific, it is about 3,200 km ____________.
| A．widely | B．with cross | C．crossing | D．in width |
26.She ____ the hospital so soon, for she has not yet recovered.
| A．wouldn’t have left | B．shouldn’t have left |
| C．mustn’t have left | D．hadn’t had left |
25.After studying chemistry for years, I can only say I have ___ general knowledge of this subject.
| A．/ | B．a little | C．a | D．Some |