________ do they try their best to support the football club for

n’t be able to come next week, because she_________ herself in Mount Tai then.

27. As five children under 10 got drowned in a southern province, it is not socially _____ for parents to leave children unattended at that age.

The astronauts started their journeys in rockets _____forward by jets of hot gas.

You have failed two testsYou’d better start working harder, ____ you won’t pass the course