When you have problems, you can _______ me_______ you.

Meimei is going to be an older sister. Her parents are planning to have their ________ child.

My uncle brought his girlfriend to ____ my parents’happy marriage with her own eyes at Christmas that year.

.– How often do you go to see your parents?— __________

_____ to nuclear radiation, even for a short time, may produce variants (变异体) of genes in human bodies.