Franklin's ability to learn from observations and experience ____ greatly to his success in public life.
| A．owned | B．contributed | C．attached | D．related |
—This is Steve speaking. Is that Mr. Smith?
—________， please. He is coming.
| A．You're welcome | B．Hold on |
| C．Never mind | D．Come on |
Both sides are determined to get what they want，and there seems to be no possibility of________.
| A．competence | B．composition |
| C．competition | D．Compromise |
After he got in touch with the Red Cross, Mr. Green ______ helping homeless women and children to a safe place.
| A．set out | B．set about |
| C．set off | D．set down |
My computer is out of _________ order all of a sudden. Could you do me________ favor and type the plan for me right now?
| A．the; a | B．the; 不填 | C．不填; a | D．不填; 不填 |
— Why are your hands that dirty?
— Oh, I______ in the garden since we finished breakfast.
| A．worked | B．was working |
| C．am working | D．have been working |