It is _________ to increase input in areas of innovation to ensure the country's promising prospect.
The old man, ________ abroad for twenty years, is on the way back to his motherland.
After five days’ climbing in the mountain, they reached ________ they thought was the place they’d been dreaming of.
It is ________ he is often late for school ________ makes his teacher angry with him.
— I promise my daughter that she ________ get a nice present on her birthday. — I think it will be a big surprise to her.
The stranger who knocked me down said, “I’m terribly sorry. I ________ you.”