Scientists think laser (be)______one of the most useful tools today.

admin2016-06-10 35

问题 Scientists think laser (be)______one of the most useful tools today.

选项

答案to be

解析 to be在此是不定式作宾语补足语。

转载请注明原文地址:https://kaotiyun.com/show/0liK777K

大学英语三级A级

相关试题推荐

随机试题

最新回复(0)