4 : Cho dạng đúng của từ sử dụng quá khứ tiếp diễn hoặc quá khứ đơn
" It was my first day of class . I ..... .. ( finally/find ) the right . On one side ò the room, Students .. ...... (Talk ) busily to each other in spanish . Other students .. . ... ( speak ) Japanese , and some ... . ( comverse) in Arabic. It sound like the United Nations . Some of students, however..... .( just / sit ) quiethy by themselves . I.... . .( choose) an empty seat in the last sow and .. ... (Sit) down .In a few minutes, the teacher...... ( wark ) into the room and all the multilingual conversation...... (Stop)