28. I had hardly got home __________ it began to rain.
30.I wrote emails to my sister and brother last week. To my disappointment,_______of them wrote me back.
29.Although going to school_________most of their time, students in the country always help the parents with the house-work.
28.---How did the interview go? ---Quiet well. Not so smoothly as I expected,________.
27.---Mary, you didn’t show up at the meeting last week? ---No, I________, but my son had a sudden fever and I had to stay at home to take care of him.
26.Newly-developed materials for spaceships can______extreme weather conditions.