THE CHILDREN ARE IN THE PARK. THEY BALL FOR THE LAST TWO HOURS, BU...

31. - TRAC NGHIEM TA 12 UNIT 2 KEY
TRAC NGHIEM TA 12 UNIT 2 KEY
31. The children are in the park. They ball for the last two hours, but they don’t seem to be tiredyet.A. have played

B

. have been playing C. played D. had been playing