—That must have been a lot of work.—Yeah, it ________ us three days to finish it.
If we don’t often use the newly learned words, we’ll _____ forget them.
It is widely____ that hard work can help students make progress.
Hong Kong’s Occupy Central protesters(抗议者)______ roadblocks on the main roads and they brought trouble to the public.
Our teacher requested that strange signs around us ____be ignored before an earthquake.
It is a long ___to build a people--centered society in china.