Chọn đáp án đúng nhất

 1, Once  through the whole complicated process, those interns will perform better
A. Guided
B. Have guided
C. Guiding
D. Are guided
2,  I felt really guilty    not spending more time with my grandmother 
A. Of
B. To
C. With
D. About
3, Those who left their luggage  would be fined up to $20
A. Attentive
B. Attention
C. Attend
D. Unattended
4, He got the highest score in the listening test   he was a little deaf
A. Therefore
B. Although
C. Because
D. Despite