FOR SEVERAL YEARS HIS AMBITION...…TO BE A PILOT.A. ISB. HAS BEENC....

24. - TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH
TONG HOP BAI TAP TRAC NGHIEM VE CAC THI TRONG TIENG ANH

24.

For several years his ambition...…to be a pilot.

A.

is

B.

has been

C.

was

D.

had been