phrasel verb

[takyel]

hi;
Please,you can answer the following question.
In the fırst half of the 20th century many scıentısts .... liquid crystal as chemical impurities with no scientific or practical merit
a)put down
b)wrote off
c)let go of
d)left out

[Nurik9740]

Hello. I wanna ask you about tenses. I have big problems with this.
Thank you for answer.

[riverkid]

Please see,

http://www.usingenglish.com/forum/as...-question.html

[mykwyner]

To write something off, means to disregard it, consider it unimportant, or ignore it.

b) is the only correct answer here.

[MrPedantic]

1. In the fırst half of the 20th century many scıentısts [wrote off] liquid crystal as XXX chemical impurities with no scientific or practical merit.

I'd agree that B is the best answer. But the question seems a little odd to me. Something seems to be missing, where I've put "XXX".

Perhaps:

2. In the fırst half of the 20th century many scıentısts wrote off liquid crystals as substances full of chemical impurities with no scientific or practical merit.

MrP

[MrPedantic]

Hello. I wanna ask you about tenses. I have big problems with this.
Thank you for answer.

Hello Nurik, welcome to Using English!

If you have questions about tenses, please feel free to start a new thread and add them there.

All the best,

MrP

[mykwyner]

I think it means ...wrote off liquid crystal as [merely] chemical impurities...