2. 外语
  3. They ______ us since five o’clock this morning until now.

They ______ us since five o’clock this morning until now.

admin2008-11-13  25
问题 They ______ us since five o’clock this morning until now.
选项 A、are helping
B、help
C、have helped
D、have been helping
答案D
解析 since five o’clock this morning until now“自从今天早上五点钟直到现在”这一段时间一直在帮助我们。
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