It ______ the workers about 20 months to build the Huhang highspeed railway.
— Where did they go ________ vacation? —They went to Shanghai.
— Did your mother come back late yesterday? —No, she _______. She never _______ back late.
He decided _______ a letter to his uncle In New York City.
Please ______in bed. It’s bad for your eyes.
---Is this your English book? --- .