Only about 50 percent of the children have been covered . . . . . . . . the immunisation programme.

Only about 50 percent of the children have been covered . . . . . . .

1.	Only about 50 percent of the children have been covered . . . . . . . . the immunisation programme.
A.	y
B.	hrough
C.	n
D.	gainst
Answer» B. hrough