---Why are they taking all the equipment away? ---- The job ________, they are packing up to leave.
The old man __________ in Tibet for two years as a volunteer teacher;it is an experience he often mentions.
Qian Xuesen tried many times _________ he found the solution to the puzzle about space technology.
Those the exam cheat must another exam tomorrow afternoon.
He admitted a lie in order to avoid .
I your success although you are in difficulty now.