Incomes in these countries are very unequally （）, with a few very rich and many very poor people.

Studies show that the younger a child starts to smoke t...

单项选择题Studies show that the younger a child starts to smoke the greater are his （）of dying early.

Today there is widespread agreement among researchers t...

单项选择题Today there is widespread agreement among researchers that （）of fathers from households causes serious problems for children.

The students have been advised to （）a healthy lifestyle...

单项选择题The students have been advised to （）a healthy lifestyle---a balanced diet, plenty of sleep and a positive mental attitude.