用动词的正确形式填空。
I (have)a toy car，but he (have)a toy bike．
have，has
雌激素的作用是（）
A.抑制输卵管运动
B.使宫颈腺分泌减少
C.降低 * * 酸度
D.促进乳腺腺泡上皮增生
E.促进子宫内膜增生
They often leave the boy alone at home. They think that he’s old enough to look after _____.
A．them
B．himself
C．themselves
D．him
