The man moved forward and looked over the edge (边缘), shrinking his shoulders.
____ at a college or university in the USA, Chinese and other international students must demonstrate a strong ability in spoken and written English.
With a lot of difficult problems ____, the manager felt worried all the time.
As we all know, it was _____ that resulted in the terrible car accident.
In order not to be disturbed ,I spent three days __________ in my study.
With online course Crazy English has over 20 million students all over China _______ the class through the Internet .