Review the use of the Present Perfect tense:
1.It (be) ___________________ 2 hours since we began doing this homework.
2. ________ you (just finish) ____________________ (do) ___________ a 15 – minute test ?
3.That’s the third time Mr. Quan ___________________ this problem in class. (repeat)
4.I (already send) _________________________ the school reports to your parents.
5.How long _______________ Susan ____________ her Facebook ? (not use)
+ She (stop) _____________________ using it for a month.
6.Recently, we (practice) _______________________ speaking English to one another.
7.Since Tony arrived, he (know) ____________________ a lot about life on a farm.
8. _________ they __________________ their summer vacation in Sapa before ? (ever spend)
+No, they ____________. They ______________________ there before. (never be)
9.I (not read) ____________________ this novel yet .
10.Up to now she ___________________ us. (not phone)