They always lay a large supply of tinned food in winter in case they are snowed up.A. outB

问题补充：

They always lay a large supply of tinned food in winter in case they are snowed up.

A. out

B. off

C. in

D. with

答案：

A. out

B. off

(答案→)C. in

D. with

解析：考查介词辨析。句意“他们在冬季总是储存大量的罐装食品，以防被大雪隔绝外界。”lay in“贮存，储备”。故选C。