Ⅰ 单句语法填空
1．(2016·太原五中第二学期阶段检测)Scientists have discovered that ____________(stay) in the cold could help us lose weight.
答案：staying
2．(2014·安徽高考单项填空)While waiting for the opportunity to get____________(promote), Henry did his best to perform his duty.
答案：promoted
