The children are seldom encouraged ________up late at night preparing their lessons,if ________.
| A．staying;once | B．to stay;ever | C．staying;sometimes | D．to stay;never |
The doctor thought ____ would be good for you to have a holiday.
| A．this | B．that | C．one | D．it |
—Have you finished the book？
—No. I’ve read up to _____ the children discover the secret cave.
| A．which | B．what | C．that | D．where |
It never occurred to me _____ you could succeed in persuading him to change his mind.
| A．which | B．what | C．that | D．if |
To improve the quality of our products, we asked for suggestions had used the products.
| A．whoever | B．who | C．whichever | D．which |
________ is of no concern to us.
| A．It rain or not | B．If or not it rains |
| C．Whether it rains or not | D．Will it rain or not |