He regretted ______ in junior.
举一反三
- He deeply regretted _______ the only opportunity to go to college.
- The boy regretted he lost a(gold) ______ chance to study abroad.
- He regretted ______ so much time playing the computer games.
- He replied quickly, but after he considered the problem more carefully, he regretted having made such a hasty decision.
- He had been a junior clerk for three years before he was promoted to senior clerk.