ответ на это письмо не короче этого письма. вот сижу думаю и ничего в голову не лезет.
hi there!
i've some free time so i decided to text you. i'm okay with talking about anything and it's even better if it's something new.
a bit more about myself: i'll be going into the army soon for my mandatory service and i'm more into technology related stuff. i also like giving advice even if it doesn't really make sense
1. They … a new reagent in their experiment. b) did not use
2. We … this metal with sulphuric acid to obtain hydrogen yesterday. a) did not treat
3. The researchers … new substances last week. a) did not obtain
4. Soon we shall receive a new laboratory equipment…? a) shall not we
5. The experiment was very difficult…? b) wasn’t it
6. … a concentrated solution contain a large amount of a dissolved substance? d) does