You can’t imagine ______ when they received these nice Christmas presents.
| A．how they were excited | B．how excited they were |
| C．how excited were they | D．they were how excited |
China’s search engine Baidu has announced the top topics discussed by netizens in 2013, research from its linked website Hao123.com.
| A．kept on | B．passed on |
| C．based on | D．spent on |
On September 22, more than 150 Chinese cities, including Beijing, observed world Car Free Day to low-carbon travel.
| A．promote | B．protect |
| C．imitate | D．contact |
—Wow, winter swimming is so fascinating! Shall we have a try?
—! It is not my piece of cake.
| A．Never mind | B．Good idea |
| C．Neither you nor me | D．Rather you than me |
It is necessary that the government solutions for the problems of air pollution to create a clear environment.
| A．should have found | B．could have found |
| C．could find | D．should find |
I’m willing to help ,I do not have much time available.
| A．Because | B．While | C．When | D．Since |