Is this the reason__________at the meeting for his carelessness in his work?
| A．he explained | B．what he explained |
| C．how he explained | D．why he explained |
Measures have been taken to prevent the river from____．
| A．having polluted | B．being polluting |
| C．being polluted | D．to pollute |
Children often display an________curiosity about every new thing they encounter.
| A．impossible | B．unreliable |
| C．extra | D．incredible |
___________in reality，the story is popular with adults.
| A．Root | B．Rooting |
| C．Rooted | D．To root |
It’s helpful to put children in a situation___________they can see themselves differently.
| A．that | B．when |
| C．which | D．where |
She was deeply___________with the amount of criticism that her play received.
| A．frustrated | B．frightened |
| C．satisfied | D．tired |