Установи соответствие между формулой вещества и его характеристикой.

1 — SO2, 2 — SO3, 3 — H2S, 4 — H2SO4;

а — образуется при каталитическом окислении сернистого газа;
б — бесцветный газ с запахом тухлых яиц;
в — смешивается с водой в любых соотношениях;
г — используется для обеззараживания помещений;
д — не растворяется в воде.
Помогите пожалуйста срочно

Помогите пожалуйста с английским...

1. Since then the monster ... at least once a year.

a) saw; b) has been seen; c) has seen; d) in being seen

2. The doctor asked how long ... the medicine.

a) would I take; b) I had been taking; c) had taken; d) I took

3. I can give you this book. You ... go to the library.

a) wouldn't; b) needn't c) may not; d) can't

4. The news made Jon ... .

a) laugh; b) to laugh; c) laughing; d) laughed

Put the suitable structure,either "it is" or "there is" there are" in each space,and act mini-dialogis.

1)What`s the time?-..........3.30. And what`s the date?-............the 24th.

2)How far........to York?-..........50 milis.

3)........hotin juli?-Yes,........

4)........very stormy last night?-Yes........stormy all over the country.

5).........freezing very hard.-............ice on the take tomorrow.

6).........yesterday that i saw him.-Really?