The monument was built in honor of the explorer who was believed__the big river.
---Would you please take a short walk with us now? ---____. But I’m busy at present.
I ___, but I didn't think you were serious.
Generally speaking, that city is ___ crowded than ___ in the same area.
---I suppos he’s late again. ----You ___ it.
--Why didn’t Tom have his lunch? It’s already one o’clock.---His pet bird ____this morning. He____still for quite a long time in his room crying.