Circus tigers, although they have been tamed, can _____ attack their trainer.

 — It's so cold today.    — Yes, it's       colder than it was yesterday.

There was such a long queue for the ticket that I ________ gave up, though I wanted to attend the concert so much.

------So you gave her your phone?------_____, she said she’d return it to me when she could afford her own.

He found it hard for Alan to focus on his teachers for longer than five minutes, _________ if the lecture was boring.