one children want to challenge themselves by learning a language different from ______ their parents speak at home.
They arrived at the farmhouse, in front of which________.A is sitting a boy B. sat a boyC. a boy sat D. a boy is sitting
All possible means ________been taken to prevent the river________.
The government is considering the environment-friendly plan which some scientists would like to see________soon.
________late, but also he forgot his books.
We'd like to do something for you________what you've done for us.