What’s ______population of China —China has_____ population of 1.2 billion.

We were all very much attracted by the beautiful scenery__________we set foot in the village [ ]

The reason why he failed is ______ he was too careless

Vera and Mike come from _____ European country. They are in _____ same school now.

enever I met him, _____ was fairlyfrequent, _____ I liked his sweet and hopeful smile