Helen always helps her mother even though going to work ____ most of her day.

One way to ________ species under threat of extinction—whatever the cause—is to remove them to zoos or parks and feed them there

One of the most important things ineducation is to let students ____ positive emotions and experience in theprocess of their learning.

Ever since my childhood, I have dreamed of ______ a heavy snow in my hometown in winter.

Can I tell Peter about thenews?—No, I don’t want anyone else to know it. You _______keep it to yourself.