There are some health problems that, when in time, can become bigger ones later on.
| A．not treated | B．not being treated |
| C．not to be treated | D．not having been treated |
When asked to explain ________ he does to make his students so fascinated with his lessons, the teacher paused and thought deeply.
| A．what it is that | B．that what it is |
| C．what is it that | D．that what is that |
_______ to her own work, she spent little time with her children.
| A．Devoting | B．To be devoted | C．Devoted | D．Having devoted |
--- Are you happy with this laboratory?
--- Not a little. We can’t have _______.
| A．a worse one | B．a nicer one | C．so bad one | D．so nice one |
Medicine shouldn’t be kept _______ it is accessible to children.
| A．even if | B．which | C．where | D．so that |
. _______ interested in the position are asked to see the manager tomorrow．
| A．Whoever | B．Who | C．Anyone | D．Those |