II. Cloze: Choose the answer that best fills in each blanks. (10%)
 "This is one of the healthiest buildings in New York." __11__ a tour ofthe new headquarters of Uber on arecent afternoon, John Days, the ride-hailing giant's global head of "workplace and real estate", does not hidehis pride. And he has plenty to be proud of. Employees make their way to their work stations up a  wood-panelled staircase, then through a sun-filled atrium __12__ doubles as the conduit for the building's natural ventilation. Meeting rooms and nooks with couches abound； desks are scarce. This __13__ techcentral, there is, naturally, a juice bar and a yoga studio.
There is only one niggle. Many Uber employees may prefer to keep working from home and come in only acouple of days a week, if __14__  . "No one really knows," concedes Mr Huaco. His firm is not alone. Upand down Silicon Valley technology companies are wondering __15__ will happen when they fully roopenafter the summer break.
【題組】11.
(A) Has given
(B) Giving
(C) Give
(D) Gave