阅读理解

	A	B	O	AB
A	A,O	A,B,O,AB	A,O	A,B,AB
B	A,B,O,AB	B,O	B,O	A,B,AB
O	A,O	B,O	O	A,B
AB	A,B,AB	A,B,AB	A,B	A,B,AB

 
小题1:If both parents are blood type O, then their children must be _________.

A．blood type A

B．blood type B

C．blood type AB

D．blood type O

小题2: If a father is blood type A and a mother is blood type B, then children’s blood types may be ________.

A．any blood type	B．blood type A and B
C．blood type AB and O	D．blood type A,B and AB

小题3:If both parents are blood type AB, then their children can NOT be ________.

A．blood type A

B．blood type AB

C．blood type O

D．blood type B

小题4: If four children of the same parents are blood type A , B, O and AB, then their parents should be ________.

A．blood type A and B	B．blood type A and AB
C．blood type B and AB	D．blood type AB and AB

小题5: If one parent is blood type AB, and his or her nine children only get blood type A and B, then the other parent’s blood type is likely to be __________.

A．blood type A

B．blood type B

C．blood type AB

D．blood type O