A. must B. can C. had to D. ought to 参考答案:B 答案解析:[精解] 基础语法知识题。此题涉及情态动词的用法,must用在肯定句中表示较有把握的推测,意为“一定”,can用在肯定句中可能性的推测,had to为have to的过去时意思是“不得不”,ought
第34题: [单项选择]The rapid development of communications technology is transforming the ______ in which people communicate across time and space. A. route B. transmission C. vision D. manner 参考答案:D 答案解析:词义辨析题。route意为“路线”;transmission意为“传输,发射”;vision意为“视力,视觉”;manner意为“方式”。本句大意为:迅速发展的通讯技术正在改变着人们穿越时空交流的方式