----Has the National Indoor Stadium been completed?----- Not yet .It’s still _________ construction.
The boy insisted that he __________ the glass. He said that he was not there then.
—Sorry, sir. I'm late again. —What excuse will you __________ for yourself this time?
This box __________ all the books you need, __________ an English-Chinese dictionary.
We'd better set off or it will be dark __________ we know it.
They often use wood as fuel to __________ coal.