Question

open the brackets.use the present perfect tense
 1)we (learn) a lot of new words since last year
 2)mrs olivier (live) in boston since last year
 3)John (lose) his keys
 4)lately ben (not attend) the class meetings regularly
 5)I (be) very busy this week
 6)he (already/finish) his work
 7)professor higgins (never/teach) in this university before
 8)they (move) to New York
 9)it`s mum`s birthday tomorrow,but I (not/buy) her a present
 10)they are not at home now.they (go out)

Answer 1

we have learned 
2) has lived
3) john has losen
4) hasn't attended
5) have been
6) he has already finished
7) has never tought
8) they have moved
9) haven't bought
10) they have gone out