高考考试

【单选题】It is absolutely necessary for us to have sufficient oxygen if we ______ to go on living.
A、are
B、were
C、had
D、having

网考网参考答案：A
网考网解析：
[解析] if we are to go on living=if we want to go on living“如果我们想要继续生存的话”。本题不属于纯假设的虚拟条件句。 document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>