Question

13．将来无人机（drones）是否会被用来送货上门，这有待见证．（remain）It remains to be seen whether drones will be used to deliver goods to your door in the future．．

Answer 1

分析 将来无人机是否会被用来送货上门，这有待见证．

解答 答案：It remains to be seen whether drones will be used to deliver goods to your door in the future．
考查remain的用法．句子里It 在形式主语，代指主语从句 whether drones will be used to deliver goods to your door in the future；remains to be seen 表示"有待见证"．

点评 考查汉译英．
remain作不及物动词的用法：
 1．表示"剩下"、"仍有"，只能用于主动语态，不可直接跟宾语，
①、They had all those that remained．他们把剩下的全部拿走了．
②、This visit willalways remain in my memory．这次拜访将永远留在我的记忆之中．
2．表示"留下"、"逗留"，特指在他人走后留下
①、They went，but I remained．他们走了，但我留了下来．
②、I shall remain here all the winter．整个冬天我将留在这里．
3．表示"尚待"、"留待"，后面接被动语态的动词不定式
①One problem remains to be solved．有一个问题尚待解决．
②That remains to be proved．那尚待证实．