He _____ have completed his work; otherwise, he wouldn’t be enjoying himself by the seaside.
. .In summer, food will go bad if________in room temperature.
. .QQ,______you can chat with your friends, makes communication easy.
. Mike must be angry with me, for he walked me without even saying hello.
. _____ you don’t lose heart, I’m sure you can pass the coming examination.
. My house is the one with a red roof on the street. It ____ and you can find it easily.