单项选择题 (Because of) the severe snow storm and (the) road blocks, the air force (dropped food) and medical supplies (close the city).

单项选择题 (In) his (latest) article Tom criticizes the way (which) the war (is being handled).

单项选择题 The unit of (measurement) known as foot (has) originally based on the average (size) of the human (foot).