Over the past decades, China _______ significantly under the correct leadership of the CPC, he said. The CPC's 18th National Congress will exert great influences on China's future and Africa highly expects of China's further growth.

John and I _____ friends for eight years. We first got to know each other at a Christmas party. But we ____ each other a couple of times before that.

This book is said to be a special one，which________many events that cannot be found in other history books.

–With the final examination approaching, I’m getting anxious. As a consequence, I have no appetite for anything and even can’t fall asleep.-- Don’t worry. Things will pick up if you ____ yourself.

Once new difficulties _________ in your work, it’s always important to use your brains．