II.Choose the best answer among A,B,C or D
13.The earth.....round the sun
A.go.       B.has gone.       C.went.       D.goes
15.I....my report when you entered the hall
A.made.                             B.have been making
C.was making.                  D.have made
16.She......this exercise yerterday at 8 o' clock
A.wrore.                            B.has written
C.has been writing.         D.was writing
Em cảm ơn ạ