I _____thank you too much for all your help to my son while we were away from home.
| A．won’t | B．can’t | C．can | D．will |
The air quality in the city，________ is shown in the report，has improved over the past two months.(2012·福建，23)
| A．that | B．it | C．as | D．what |
—What do you think of teaching，Bob?
—I find it fun and challenging.It is a job ________ you are doing something serious but interesting.
| A．where | B．which | C．when | D．that |
It's helpful to put children in a situation ________ they can see themselves differently.
| A．that | B．when | C．which | D．where |
Whatever is left over may be put into the refrigerator，________ it will keep for two or three weeks.(2011·安徽)
| A．when | B．which | C．where | D．while |
Sales director is a position ________ communication ability is just as important as sales skills.(2012·重庆)
| A．which | B．that | C．when | D．where |