He ___ in the factory for three years before he joined the Army.
举一反三
- He__ in the factory for 3 years before he joined the Army. A: has worked B: works C: had worked D: will work
- He for three years. A: has joined B: has been in the army C: joined D: has served the army
- He ____ for three years. A: has joined the arm B: has been in the army C: has been serving in the army D: joined the army
- His brother joined the army three years ago.His brother______ ______ ______the army for three years.
- He _________ the League three years ago. A: joined B: has joined C: joins D: is joining