elearn site

1. It is late, so we don′t call you.
If . 

2. He′s sorry now that he didn′t invite Molly to his party.
He wishes . 

3. I didn′t know it was your birthday, so I didn′t send you a card.
If . 

4. If there is no taxi, we′ll walk to the station.
Unless . 

5. Definitely I would not give it up.
I wouldn′t give it up .