It looks _______ it were going to rain.

A．even if

B．as if

C．even though

D．like

该患者曾反复用过多种助消化药物，均效果一般。

宜改选哪一种药()

A．Omeprazole(LOSEC)

B．Domperidone(Motilium)

C．Famotidine

D．De-Nol

E．Furazolidone