Before leaving the dinner table,............your son.............ask permission ( have to ) We.............( not see ) each other for a long tim Whlie i..............( watch ) the peformance, i met one of my friends
2 câu trả lời
Before leaving the dinner table, your son has to ask permission. We haven't seen each other for a long time. Whlie i was watching the peformance, i met one of my friends
1 . has to
2. haven't seen (hiện tại hoàn thành )
3. was watching (quá khứ tiếp diễn )