Only through constant practice can the ability of using a foreign language be _______.
| A．earned | B．acquired | C．gained | D．achieved |
She ________ on her work so much that she didn’t notice that a crowd of people had _______around her.
| A．focused; focused | B．fixed; gathered |
| C．concentrated; concentrated | D．carried; collected |
The doctor, ________ by several nurses, successfully performed the difficult operation on the patient.
| A．aided | B．assisted | C．helped | D．guided |
People tend to live more happily and longer if they are ________ about life.
| A．pessimistic | B．enthusiastic | C．optimistic | D．terrific |
---How is your mother doing? Is she ________?
--Oh, thank you. As a matter of fact, she _______.
| A．looking up; has recovered | B．picking up; is already back on her feet |
| C．picking out; is well again | D．taking up; has already been back on her feet |