at a loss for a word he gave up the speech?翻译,语法分析!

at a loss for a word he gave up the speech?翻译,语法分析! the man was at a loss when ------word camethat he was forbid he is at a loss The driver was at a loss when (a/不填）word came that he was fo at a loss for a while 英语翻译这段英文如下:i am never at a loss at a word but he is never at Who is the man?—Oh,he's the teacher _ gave us a speech. -who is the man?-oh,he is the teacher ( ) gave us a speech y He________(make) a speech at the meeting tomorrow,is he I am at a loss for ouraffection 翻译Themanageris going to make a speech at the beginning 翻译：有点不知所措(at a loss)