1.--When were you born?
--I was born()October 18th,1991
[选A,“在某月某日”,即“具体的某一天”介词用on.但如果是单单“在某月”,则介词用"in",如in October(在10月)]
A.on B.in C.at D.of
2.--Whose postcard is this?
--I think it()be Linda's.
[选C,may(也许),用于表示没有把握的推测.而will(将),need(需要)显然不符合题意,可排除.]
A.will B.did C.may D.need