120. The submission deadline for financial aid __________
for international students at Ostlere University has been put dff until June 28.
에서 has been 을 had been으로 사용하면 안되는가요?
120. The submission deadline for financial aid __________
for international students at Ostlere University has been put dff until June 28.
에서 has been 을 had been으로 사용하면 안되는가요?

1
