问题
选择题
.Mary is so wet. She _______ in the rain.
A．must be caught
B．must have been caught
C．should have been caught
D．can have been caught
答案
答案：B
“Mary浑身都湿透了。她肯定淋了雨。”“淋雨”是过去的情况，因此是对过去情况的猜测，而should have been caught意思是“本应该淋雨”不符合题意，答案B。