30. — Whyyou be talking so loudly while others are studying?– I am terribly sorry.

The group ______ the eight richest countries in the world signed a contract last week.

Is Bob still performing? — I’m afraid not.. He is said ____ the stage already as he has become an official.[ ]

A hard-working man__ _______become a great scientist, but a great scientist__________be a hard-working man.

Our daughter passed the test yesterday.— So she did. She for it really hard.