помогите найти окислитель и восстановитель, пожалуйста
HBr + MnO2 ---->MnBr2 + Br2 + H2O

Put the verbs in
brackets in the Present Simple, Present Continuous, Past Simple or Past
Continuous

1.     What ____________you ______________(look) at? –Some photos
I __________(take) when I _____________(be) on holidays.

2.     I _______________(be) sorry, but I ______________(not
understand) what you _____________(mean).

3.     What ___________Jane_____________(do)? – She
______________(be) a teacher, but she ______________(not teach) at the moment.

4.     He never _____________(smoke) and ___________usually
__________(not eat) meat.

5.     Last time I _____________(go) abroad was when I
______________(go) to London.
We _____________(stay) in London
for three days. On the first day when I ______________(do) the sights, I
_____________(meet) my old friend. He ___________just______________(go) to his
hotel when we ___________(come) across.

6.     ___________you ____________(often, go) to the gym? – I
_______________(not go) much at the moment, I ____________(not have) time. I
____________(be) too busy these days. But I ___________(want) to go to the gym
next week.

7.     Tomorrow Kate _____________(visit) her aunt, that’s
why now she _____________(make) a cake. It _____________(smell) delicious! When
Kate ____________(visit) her aunt last week, she _______________(buy) some
pastries from the baker’s, but they _____________(not be) that good.