_________there’s a problem, I won’t disturb you.
As/since
I sent Luiza an invitation, but I don’t know__________she’s coming.
whether
You can borrow my dictionary__________you bring it back on Monday.
as long as
You’d better tidy your room,____________your mother will be angry.
otherwise
I’ll take some sandwiches with me_________I get hungry.
whether
We agreed to buy my daughter a dog__________she takes it for a walk every day.
as long as
I left early__________miss the rush-hour traffic.
so that I could
The_________I didn’t ring you was that I’d lost your phone number.
reason why
My girlfriend didn’t feel very well___________, we left the party quite early.
therefore / as a result/ so
I must write that letter now, _______I’ll forget to do it.
otherwise