A lot of language learning,__________ has been discovered, is happening in the first year of life, so parents should talk much to their children during that period.
“How is your tour around the North Lake? Is it beautiful?” “It ____ be, but it is now heavily polluted.”
You had better go at once, ____ you?
Every morning the pupils read the texts ____ in the classroom.
The number of people invited ____ fifty, but a number of them ____ absent for different reasons.
You’ll find this map of great ____ in helping you to get around London.