More strict measures should be takenmore people are infected with the virus of H1N1 flu.A.

问题补充：

More strict measures should be takenmore people are infected with the virus of H1N1 flu.

A. so that

B. as if

C. in case

D. even if

答案：

A. so that

B. as if

(答案→)C. in case

D. even if

解析：短语辨析。 A. 以便；所以 B.犹如；好似 C. 万一；假使 D.即使；虽然。句意：万一更多的人感染H1N1流感病毒，必须采取更严厉的措施。故选C。