He was caught in the heavy rain.That’s ___ he was ill.
A number of books in the library ____ been stolen so that the number of them ____ smaller than before.
After Billy said he would ride a mountain bicycle, his father _____ to him and bought him one.
The film makes me think of the happiest days ______ we spent together.
Could you tell me _____?
―Where did you find the gloves?―In the case(箱子) Mother put the old clothes.