WHAT ARE THE QUALIFICATIONS OF A GOOD WORKER
17. What are the qualifications of a good worker? - It is essential that he ________ efficient.
A. is
B. be
C. will have been
D. could be
17. What are the qualifications of a good worker? - It is essential that he ________ efficient.
A. is
B. be
C. will have been
D. could be