She stopped her car immediately ______ she saw a rushing truck coming to her.
| A．when | B．where | C． while | D．as |
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 |
________ the necessary equipment, the seriously wounded man had to be sent to another hospital for the operation.
| A．lacking | B．Lacking of | C．For lack of | D．Lacking in |