天津虹桥医院:He studied at the high schllo ___he joined the army.

He studied at the high schllo ___he joined the army. He studied in the USA for three years He felt astonished at the ()news. he pointed back at the unassuming structure he looked at the sharks now near the shore He _____________ help at the scene of the accident. He _____________ help at the scene of the accident He studied medicine as well as surgery. When he entered the classroom,he was some parenrs ___ at the back of it. When he heard the alarm,he was leaving the place at once.