There goes the bell for the class.Let’s stop___.

Please make my excuse at tomorrow’s meeting--- I’ve got too much work _____. 

________ thousands of Chinese students，Chuck has vast experience in the Chinese class.

The increasing use of foreign words may lead to _________ the good qualities of traditional Chinese.

I witnessed the gate of the bank _______ open and many men entering it, but I couldn’t make them out in the darkness.