Do you think ______ important _______ us to learn a foreign language?
Jenny worked hard before the final examination,and it_______.She got an A. A.showed off B.paid off C.put off D.took off
All the things __________ must be done well.
Follow your doctor’s advice,_____ your cough will get worse.
I spent five hours_____________ the book__________ I paid 10 dollars.
When the old man_____to walk back to his house,the sun____itself behind the mountain.