Unlike the fossil fuels of today, biofuels arerenewable sources, which mean that they will not____ easily.

The central government is taking measures tothe prices of daily necessities.

How beautiful your skirt is!—________.

_____ seems strange to all of us is _____ thegirl is crazy about football.

How about your journey to Mount Tai? —Everything was wonderful except that our car _________ twice on the way .