单选题 Public schools in the United States have to be neutral about religion ____ they close for holidays like Christmas.

单选题 People who often exercise and stay active are much less likely to develop heart disease than people who rarely move, ________ that exercise consists of a few minutes a day of jogging or multiple hours a week of walking.

单选题 The party will be held in the garden, weather ______.

单选题 How come Meng Wanzhou, Huawei CFO, was arrested in Canada, _____ she didn't violate any Canadian law?

单选题 ______ in his work, Tom simply forgot food and sleep.

单选题 ______, the conference began.

单选题 Her performance was perfect and, _____ the fact that there were other 20 participants, the first prize still belonged to her.

单选题 Much time ______ sitting at a desk, office workers are generally troubled by health problems.