Vitamin D helps our bodies make a special chemical,and this special chemical, ______ affects our brains,making us feel happy.
I’m not ill. __________, I ’m very healthy.
— Could I use your computer for a few moments, please? — __________. I’m not using it myself.
–What’s that noise? –Oh, I forgot to tell you. The new machine ______.
__________ the kids have left home, we’ve got a lot of extra space.
The naughty boy _____ to me that the hen _____ there just now had ____ two eggs the day before.