It was not until dawn__________ the snowcapped peak in the remote area in Tibet.A．that they sightedB．did they sightC．that they did not sightD．had they sighted
It was not until dawn__________ the snowcapped peak in the remote area in Tibet.
A．that they sighted
B．did they sight
C．that they did not sight
D．had they sighted
B．did they sight
C．that they did not sight
D．had they sighted
参考解析
解析：考查强调旬。句意为“在西藏，直到黎明他们才看到远处被雪覆盖的白皑皑的山峰”。该强调句型为：It is／was not until+被强调部分+that+其他部分．此句型中It is／was not…已经是否定句了．that后面的句子要用肯定式，且须用陈述句语序。故选A。
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