He is very worried _______ his new job because he...

Câu hỏi: He is very worried _______ his new job because he is not quite prepared _______ working.

A on / over  

B to / off      

C about / for  

D in / at

Câu hỏi trên thuộc đề trắc nghiệm

- Unit 8 - tiếng Anh 12 (có lời giải chi tiết)