. I’d appreciate ________ if you would be willing to teach me how to pronounce these new words. 

Our city has changed a lot; who can tell what it will be like in ___ ten years?

(2014·日照模拟)The new traffic rules that took effect on January 1 are much stricter than________in the past.

—What do you think of the performance today?—Great!____but a musical genius could perform so successfully.

______ the Chinese have been to Beijing.