—Do you think our teacher is　　　　？—Yes， he always corrects our homework and prepares his lessons　　　　. 

. Bob is____ honest boy, and he won’t tell lies.

The conservation area is very important for preserving many animals and plants, which would ______ run the risk of becoming extinct.

The patient’s progress was very encouraging as he could ________ get out of bed without help.

I can ___ believe that it was raining.