问题

Vitamin D helps our bodies make a special chemical，and this special chemical，________，affects our brains，making us feel happy

A:stays
B:lay
C:stay
D:stayed

正确答案是：

同类题型

By 2015, China plans to have its own Global Positioning System ( GPS) _____ more than 30 satellites. [ ]

下列多音字归类正确的一项是

I love doing morning exercises ____it’s good ______us.

64. We have to__________a new manager from a short-list of five candidates.

The new government made a promise that they would surely improve the________of people’s life.