【题目】I was thinking of going to see Andrew when who appear but Andrew himself.
A.would
B.should
C.could
D.might

【答案】B
【解析】句意：我在考虑去见安得烈，正当这个时候，安得烈本人竟然出现了。should，可译为“竟然，应该，按理说”。故B项符合题意。