The new education system is said to be _______ to thesuccessful development of the country.

— What is the price of gas these days? — Oh, it _______ sharply since last month. [ ]

I like summer．What about you–I don’t like summer it is too hot．

Whenyou free last week — Well, Ihave a free day because there was too much work.

Little Jim to my home after he broke my mobile phone by accident.