What do you admire the spaceman ______—His bravery to travel around the earth______ a spaceship all alone.

________ when thedoor burst ______.

28Vitamin D helps our bodies make a special chemical, and this special chemical, _______, affects our brains, making us feel happy

The teacher, as well as his students_______to attend the party last week.

Only when he got there _____how much damage had been caused.