用括号内所给动词的适当形式填空。 1. When I entered the office, the boss stopped _____ (talk) with me. 2. In e-mail English, punctuation marks are used for _____ (show) feelings. 3. The host family did their best to make me _____ (feel) at home. 4. You're not supposed to eat or drink while _____ (walk) down the street. 5. All of the students _____ (suppose) to hand in their homework on time. |