When the first ______ came to the US, they were hungry as they have nothing to eat.
Everything changed ________ quickly that I hardly had time to prepare.
________ people go abroad, they have to bring their passports with them.
Never visit strange websites, ________ the thieves may crack(破译)the password of your Internet account.
________ exciting music the woman is playing!
Jerry ________ with a stranger when I met him on the way to work yesterday.