The lights in the classroom are still on. -Sorry. I’ll go and ______.

对下列文言特殊句式和句中加点词语的解释，不正确的一项是

If we can ___ our present difficulties, then everything should be all right.

I hear that your good friend David ____________ books about history.— Yes, but now he ____________ novels.

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