问题 翻译题 英文释义（连线）。( )1. teenagers ( )2. part-time ( )3. concentrate ( )4. at present ( )5. get to a. fix one's attention on something b. for only a part of the working day or week c. kids aged from 13 to 19 d. begin to e. at this time , now 答案 1-5 cbaed
