Question

Doctors around the world are preparing ________ a possible outbreak of bird flu because few current vaccines will guard against．

[　　]

A．

against

B．

with

C．

beyond

D．

regardless of

Answer 1

答案：A
解析：

句意为“全世界的医生都在防备禽流感的爆发，因为禽流感还几乎没有疫苗进行预防”。prepare against是固定短语，意为“防备”。