giải thích cho mình từng câu lun nha ?
1.all successful applicants are required ...................... a week long training progamme before commencing their new role
A. to attend
B. attending
C. to be attending
D. attend
2. We must .......... carry a thorough investigation into the causes of the riot
A. on
B. out
C. off
D. up
Loga
Sinh Học lớp 12
