1.Укажіть речовину, яка може реагувати із залізом:
а) K2O; б) S; в) NaOH; г) SO3.

put the verbs in brackets into the correct tense

1) If I (be)  you, I would phone my mouther tonight. 

2) If he hadn't stopped the car, he (have) an acident, 

3) I (give) some money to charity if  i won a competition.

4) Unless we (leave) now, we' ll be late. 

5) Your friend wouldn't have phoned if you (not/meet) her in the street.