/ Present Perfect (Hiện tại hoàn thành) Exercise : Chia động từ trong ngoặc ở đúng thời 1/ My wife and I (be) .................there several times in the past. 2/ We (study)................ almost every lesson in this book so far. 3/ He (visit)................ his friends recently. 4/ - You (see) .......................her today ? - No, I haven't seen her yet. 5/ She (do) ....................her homework already. 6/ They never (go) ..................to the cinema in their life. 7/ Tom, I (not see).................. you for ages ! Where have you been ? 8/ He is the most kind-hearted man I ever (meet).......................... 9/ There (be) ......................3 accidents on this street in the past 3 days. 10/ Is this the first time you (visit)................... our beautiful country ? 11/ Scientists (find) ..........................cures for many illnesses in the last 50 years. 12/ My uncle's health (improve) since he (leave)........................ India. 13/ I (buy) a new shirt last week but I (not wear) it yet. 14/ I (not see ) ...................Lan since we (leave).................. school. 15/ We just (move)................ to a new house but we (be)....................dissatisfied with it. Các bn giúp mik với,mik cần gấp,thanks mn trc nha