问题

__________ to smart phones just before bed, as a research says recently, can lead to poor night’s sleep.

A:Being exposed
B:Exposed
C:Having exposed
D:To expose

正确答案是：

同类题型

When we got into the hall, all we could hear was the cheer, “Eagles! Eagles!… ___________ Eagles!… Eagles!”

Good morning.——_____________.

He forgot my birthday, didn’t he–.He wanted to give you a big surprise.

Would you kindly tell me ______

Look out! That tree _____ fall down.