The teachers are supposed to teach us about “safe sex” but most of them are too________.

.The report shows that global climate change__________the drought in Southwest of China but ______ we need to make greater efforts.

—You know. Bob is a little slow ____ understanding, so…— So I have to be patient ______ him. 

I thought Jim would say something about his school report, but he ______ it. 

These photographs will show you _____________.