I don’t think it is ______taking the trouble to explain the question to him.
| A．worth | B．worthy |
| C．worth of | D．worthwhile |
Jack has had no ________experience of this kind of job，but he got the job offer just due to his honesty.
| A．previous | B．obvious | C．cautious | D．precious |
________in a traffic jam yesterday morning，Jack did not arrive at his office on time.
| A．Catching | B．Caught | C．To catch | D．To be caught |
Sam managed to keep in________contact with his family while he was working in New Zealand.
| A．pleasant | B．confident | C．constant | D．different |
The boy is always found______in reading books.
| A．to bury | B．burying | C．buried | D．buries |
After a few courses on painting，Helen said she would ________oil pointing in her spare time.
| A．look up | B．take up | C．bring up | D．put up |