Stressful environment leads to unhealthy behaviors such as poor eating habits, which _____ increase the risk of heart disease.
Food supplies in the flood-stricken area _______. We must act immediately before there’s none left.
He _______ have taken your car by mistake because he didn’t have the keys.
It is not always easy for the public to see _______ use a new invention can be of to human life.
He dressed up and went to the party as if ________.
After completing and signing it, please return the form to us in the envelope _______.