Not until ___himself seriously ill.A.he had completed the task did he findB.had he completed the task did he find C.he completed the task he had found D.did he completed the task he had found 求正确答案,并请详细说明
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Not until ___himself seriously ill.A.he had completed the task did he findB.had he completed the task did he find C.he completed the task he had found D.did he completed the task he had found 求正确答案,并请详细说明
Not until ___himself seriously ill.A.he had completed the task did he find
B.had he completed the task did he find C.he completed the task he had found D.did he completed the task he had found 求正确答案,并请详细说明
Not until ___himself seriously ill.A.he had completed the task did he findB.had he completed the task did he find C.he completed the task he had found D.did he completed the task he had found 求正确答案,并请详细说明
选A
原句：（He did not find himself seriously ill） until he had completed the task.
Not until表否定,放到句首,until后面的句子仍然跟着until,但引起主句（上面括号里的是主句）部分倒装,所以是把until后面的句子抄下来之后继续写did he find himself seriously ill.
A选项是唯一正确的答案，无论是逻辑还是语法，这是因为Not until (直到..时候)放在句首时，后面的主句要倒装，即主语和谓语要颠倒过来，在这个句子中，he found 是主句，倒装后就成了 did he find。
这样解释你清楚吗？呵呵！
选A的，根据意思，原来的句子，应该是：Until he had completed the task ,he didn't find `````因为not until是否定词，放句首是要倒装的，根据倒主不倒从的原则，即主句倒装，从句不倒装。所以是把he didn't find````倒装，所以选A
A is right.
“Not until+陈述句”可作为倒装句前面部分，后面接部分倒装（即助动词+主语+动作）。