哮喘控制气道炎症最主要的药物是

A.P2肾上腺素受体激动药

B.M受体拮抗药

C.抗生素

D.吸入糖皮质激素

E.组胺H₂受体拮抗药

Charles was alone at home，with _____ looking after him.

A．someone

B．anyone

C．not one

D．no one