The children all looked _____ at the broken model plane and felt quite _____.

Do remember to be________. We must avoid any possible risks when doing this dangerous chemical experiment—burns, poisonous gases or cuts from broken tubes.

. Unluckily I don’t have a lot of ______ memories of my childhood. There were no good friends, no amazing adventures, and no wonderful holidays.

John is very ____    ——if he promises to do something he’ll do it . 

．The two brothers look so much ___ that we can’t___ one from the other．