Jack has been working hard and _____ is no doubt that he will do a good job in the entrance exam.
There is some doubt whether he will______ at the meeting.
The reason______ he was late for work was______ he didn’t get up early.
Before building a house, you will have to ______ the government’s permission.
The government has to close those small factories to prevent the water of the river___.
Along with the letter was his promise _____ he would visit me this coming May Day.