—What has ________ done since 1989?. —It has built many schools for poor children .
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 .
He hurried to the station only that the train had left.
It was Asimov was eleven years old his talent for writing became obvious.