1.

I have to be at the airport no later than 10:30. 
I have to be at the airport  .

2.

Let me know no later than Saturday whether you can come to the party.
Let me know  .

3.

Please make sure that you are here no later than 2:00.
Please  .

4.

If you want to take the exam, you have to register no later than April 3.
If  .

5.

If we leave now, we should be in Miami no later than lunchtime.
If  .

1.

I've been offered a job. I haven't decided yet whether to accept it or not. I have to decide  by until Thursday.

2.

I think I'll wait  by until Thursday before making a decision.

3.

A: I hear you're writing a book. Have you finished it yet?
B: Not quite, but I hope to finish it  by until the end of this month. 

4.

A: I'm going out now. I'll be back at 4:30. Will you still be here?
B: I don't think so. I'll probably have gone  by until then. 

5.

I'm moving into my new apartment next week. I'm staying with a friend  by until then.

6.

A: Do you think I'll still be unemployed this time next year?
B: No, of course not. I'm sure you'll have found a job  by until that time.