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 |
The mother ________ her son's success in the newspaper.
| A．learned about | B．learned | C．heard | D．learned from |
Sports build the body _______ reading builds the mind.
| A．while | B．when | C．as | D．for |
As we all know, ______ knowledge comes from _______ practice.
| A．the; the | B．a; a | C．the ;× | D．×; × |
We should prevent pollution ________ happily.
| A．to live | B．for living | C．from living | D．living |
The line is engaged. I can’t _____ now.
| A．get on | B．get along | C．get through | D．get down |