The 18-storeyed building, when _____, will shut out the sun _____ up the rooms in my house.
The little boys were tricks on the girl when their teacher came into the classroom.
You did not perform as well as the other competitors--- ,you failed.
I like getting up very early in summer. The morning air is so good ______.
The fire made _____ difficult to rescue the people trapped under the ruins in the earthquake.
The mother waved to her daughter until the train .