MILLIONS OF CHRISTMAS CARDS ………… . C. HOW LAST MONTHLONGA. SENT B....

53. - BAI TAP TRAC NGHIEM TONG HOP A9
BAI TAP TRAC NGHIEM TONG HOP A9

53. Millions of Christmas cards ………… .

c. how

last month

long

a. sent b. have sent c. are sent

d. in

d. were sent