【题目】The drill in Antarctica dragged on slowly because of lack of money, equipment breakdowns, environmental _____ and severe cold.
A.concerns
B.assumption
C.occupations
D.ignorance
在线课程【答案】A
【解析】考查名词。Concern“忧虑，担心”；assumption“假定，设想”；occupation“职业，占领”；ignorance“忽视，不管”。根据题意可知，他们担心环境问题，故选A。