Ответ:

B) 1. is still being discussed; 2. was being built; 3. was being asked; 4. was being made; 5. is being examined; 6. is being explained;

C) 1. had been held; 2. had been built; 3. has been made; 4. has been listened; 5. had been submitted; 6. had been invited

Объяснение: