She never dreamed of _____a chance for her to meet her old friends again. [ ]

What’s the use of this kind of machine-It can make the train fast.

Jane was able to play the piano years ago. The underlined part means .

achievements_______ without thecontribution of Qian Xuesen, a key leader of the New China’s nuclear, missileand so on

_____ there may be sharks near the beach, people still swim there.