_Stressful environments lead to unhealthy behaviors such as poor eating habits,which_______increase the risk of heart disease

don’t know how they ____the first couple of weeks after the strong earthquake.

Now old Henry is very sad, so he doesn’t want to do.

It is generally believed that teaching is _____ it is a science.[ ]

They usually have supper ______ 6.20 p.m. ______ the evening.