As nobody here knows what is wrong with the machine, we send for an engineer to handle the problem.
| A．should | B．must | C．can | D．would |
Look! Xiao Wang is too sleepy to work . He ____ up watching TV .
| A．mustn''t have stayed | B．shouldn''t have stayed |
| C．mustn''t stay | D．ought not to stay |
When somewhat better ________ academically, he returned home to continue his research.
| A．equipped | B．had equipped |
| C．provided | D．providing |
_ properly, a car can be used for many years.
| A．Maintained | B．Maintaining |
| C．To be maintained | D．To maintain |
Only when he apologizes for his rudeness________ to him again.
| A．I will speak | B．will I speak | C．do I speak | D．I speak |
— Is this book interesting?
— Yes, but I'm sure it won't interest .
| A．everybody | B．anybody | C．nobody | D．somebody |