动词的时态请分析~1.I can’t give you an answer before I ____carefully

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动词的时态请分析~
1.I can’t give you an answer before I ____carefully
A have been thinking it over B have thought it over
C think it over D thought it over
2.Robots ____to do dangerous job in industry
A.are often designed B often designed
C often design D have often designed
design已经是动词了,所以我觉得再加are不必要了?

B,在我认真思考过之前我无法给你一个答复.
前面用的是一般现在时,before后面的时态应该用完成时态,我对语法也没什么研究,就是凭语感...用过去时又显然不对,说话的时候还没有思考过,而且同一个句子中,应该用平级的时态.一般现在时不符合句子意思,而现在完成进行时太over了.
A,在工业中,机器人通常被设计出来完成一些危险的工作.
这里用are表达的是被动的意思,所有后面用designed而不是design

At this moment,I can't give you an answer yet.I'd like to sp "Larry,I can't give you an answer ____ I think it over," sai At this moment, I can't give you an answer yet是什么意思? If you can't answer the question _____(正确的),I will give you I can only give you an answer ______ I think it over 是用until 6页21.I can't give you the answer yet .I'd like------------mo 6页21.I can't give you the answer yet .I‘d like------------mo 高中英语语法题一道,With ,I can’t give you a definite answer now.(disc i give you my chance chance you give me an answer answer是什么歌英语选择.1.I ____ give you an answer tomorrow,I promise!A.must B i'll___you plan,and give you an answer tomorrow I give you an answer和 I give to you an answer,这两句话翻译是不是没区别,是