The business school professor studies teaming, _______ people come together quickly (and often temporarily) to solve new or urgent problems.

What will we do when all the oil in the world has

18．In this experiment, they are woken up several times during the night, and asked to report what they _______

Did you ________ yourself in Beijing—-Yes, I had _________ places of interest inBeijing.

－______ English ______ as the official language in Cuba－No； the official language there is Spanish.