22.In general， the old man is generous. But ____， he was mean to an old beggar.
| A．at once | B．once again | C．for once | D．once over |
Most of the young girls know they should cut down on fat, but knowing such a thing isn’t of much help when it ______ shopping and eating.
| A．refers to | B．comes to | C．speaks of | D．focuses on |
I don’t know for sure how many of you would like to settle here ---- it is a(n) ______ of personal preference.
| A．affair | B．event | C．matter | D．taste |
The number of people ________ this happens is not very large.
| A．with whom | B．to which | C．to whom | D．on which |
A lot of research and studies have shown that Trench oil, taken out from kitchen waste, ______ the increase of cancers.
A appeals to B. attends to C. contributes to D. devotes to
The police set out in search of other children who might ______ Guizhou’s dustbins after 5 deaths for warmth.
| A．live | B．rescue | C．exist | D．survive |