男孩，6岁。发热伴右腮腺肿大2d。体检：体温39.5℃，右腮腺局部红、肿、压痛明显，腮腺导管开口可见黄白色分泌物。血白细胞15×10⁹/L，中性 80%。3d前有流行性腮腺炎接触史。

A．流行性腮腺炎
B．化脓性腮腺炎
C．化脓性淋巴结炎
D．腮腺炎病毒引起的颌下腺炎
E．其他病毒性腮腺炎

Since William had been seriously ill for several months, his parents were worried about（）to return to school full-time.

A.he wanted

B.he wanting

C.him to want

D.his wanting