1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those

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1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those

1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those
1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those

1. Don’t talk about such things of __________ you are not sure. A. which B. what C. as D. those
选  A
Don’t talk about such things of _which___ you are not sure.不要谈论你不肯定的(你没把握的)事情.
be sure of sth 是词组,词组里带有of
Don’t talk about such things (主句) of _which___ you are not sure(定语从句)(of 也可以防在句末:Don’t talk about such things which you are not sure of)
such things“ 这样的事情”是先行词,which是连接词引导定语从句