Use the Present Simple or the Present Progressive Tense instead of the infinitives brackets.

Look! It (to rain). 2) 1 to think) about your behavior. What you to think) you to do)? 3 Excuse me? (to look for) the post-office. Is there one near here? 5) Listen! You (to hear that noise? "That's our neighbours. They shout) again". "They always (to shout) like that?" 6) who this house (to belong) to? "Tony (to feel something's wrong, but he can't say what. "Well, I (to believe we'll soon learn everything." 8) Marta constantly (to complain)! 9) "Why he (to look) so gloomy?" (to have) toothache."