Though difficult, I ________ him find a job, which made him very pleased.
| A．tried to help | B．managed to help |
| C．tried helping | D．succeeded to help |
The traffic on the main street has a longer green signal than ________ on the small ones.
| A．one | B．this | C．that | D．it |
At our factory there are a few machines similar to ________ described in this magazine.
| A．them | B．these | C．those | D．ones |
Although Rosemary had suffered from a serious illness for years，she lost ________ of her enthusiasm for life.
| A．some | B．neither | C．none | D．all |
I've lived in New York and Chicago，but don't like ________ of them very much.
| A．either | B．any | C．each | D．another |
To her joy，Della earned first the trust of her students and then ________ of her colleagues.
| A．that | B．one | C．ones | D．those |