The thirteenth of September
The 13th of September
September 13
13 September
13th September
1.
1) was singing
2) had been teaching
3) had been walking
4) had won
5) invented
6) had bought
2.
1) was washing
2) did
3) had crashed
4) had been playing
5) had cleaned
3.
1) They visited the British Museum last week.
2) I was reading an interesting book when a friend of mine phoned me.
3) By the time I arrived at the station, the train had left.
4) I had been learning English for two years before I visited England.
1. follow
2. contact
3. strangers
4. safe
5. address
6. permission
7. cautious
8. if
9. messages
Я думаю, что неисчиляемое, т.к.зубок чеснока будет - a clove of garlic.