The monument was built in honor of the explorer who was believed _____ the river.
Is there any food? I am _________.
English is understood all over the world ______ Turkish is spoken by only a few people outside Turkey itself.
---Did you hear the quarrel just now? ---________ I did.
She remains optimistic (乐观的) in spite of so much hardship she has _______ .
Doing morning exercises _______ our health and we _______ it.