--Will there be fewer trees? --_______________.
The only language ____ is easy to learn is mother tongue.
It is well-known that such a thing must ________ happening again.
-I wonder if your wife will go to the party. -If your wife ____ ,so _______ .
— I phoned you at six yesterday afternoon, but nobody answered. — I _______ a walk with my parents near the river.
–Do you know __________tomorrow? --At 8 o’clock.