Smoke could be an ominous sign that something bad is going to happen. A confounding question is one that surprises or confuses someone. Feeling miserable means feeling uncomfortable or unhappy, such as from a cold. Thanking someone for a gift graciously means doing so in a pleasant and polite way. A teacher may beam at a student who just did something good. Having self-assurance means being confident and sure of oneself, as shown by a speaker. Monitoring someone's temperature involves regularly checking their progress. Feet exposed to the sun for a long time may get sunburned since they lost their protection. A battery needs to be installed in a toy to make it ready to use. Dark clouds, flashes of lightning