Mr. Johnson ______ his boss ______ his careless mistake.
| A．apologized; about | B．apologized to; about |
| C．apologized to; for | D．apologized; for |
With so many children playing outside and making so much noise, he seemed unable to __________ on his homework.
| A．connect | B．concentrate |
| C．fix | D．fill |
Great attention must be paid __________ welfare, especially in the poor area.
| A．develop | B．to develop |
| C．to developing | D．developing |
—When did you last hear __________ Jay?
—He phoned me this morning, and we agreed __________ a time and place to meet.
| A．of; to | B．about; with |
| C．from; with | D．from; on |
The reason why he was late for school this morning is __________ his bike broke down on his way to school.
| A．that | B．because |
| C．since | D．as |
I didn't want to go with him, so I invented a (n) __________ about things I had to do on Friday.
| A．excuse | B．reason |
| C．cause | D．explanation |