--I'm told that John had another car accident this morning.
--I believe not. He _________so careless.
| A．shouldn't have been | B．wouldn't have been |
| C．couldn't have been | D．mustn't have been |
Whenever I met her, ______ was fairly often, she greeted me with a sweet smile.
| A．who | 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 |
Mark drives his car too fast and, what's more, very carelessly, ________ worries his mother.
| A．a | B．what |
| C．it | D．which |
Occasions are quite rare ________ I have the time to spend a day with my kids.
| A．who | B．which |
| C．why | D．when |
The three backpackers finally reached the top of Mount Huangshan, ________ they could enjoy the breathtaking sights to their heart's content.
| A．when | B．where |
| C．why | D．how |