【推荐1】I was about to throw everything away ________ my mother came in. （用适当的词填空）

【推荐2】We were about to set off ________ it suddenly began to rain.

【推荐3】There was a time________my son devoted much of his time to developing a robot (所给词的适当形式填空)

【推荐1】单句语法填空
1. I tried ______ (knock) at the back door, but nobody answered.
2. The sun ______ (shine) high in the sky when a deer raced into the courtyard of the house, where a little boy was playing.
3. We were all amused to watch two ______ (train) elephants perform dances.
4. There is little doubt that the working conditions will improve in the not too ______ (distance) future.
5. The villagers called in several ______ (expert) to teach them how to prevent plant diseases.
6. We were told that we should follow the main road ______ we reached the railway station.
7. The rare animals will die out if men are allowed ______ (shoot) as many as they wish.
8. The dishes ______ (cook) by my mother taste fresh and delicious, and are loved by the whole family.

【推荐2】Time flies so fast that we are all grown up ________ we even realize it.(用适当的词填空)