I _____ open the bottle now. But I _____ open it a moment ago.A. can’t, couldn’t B. can, could C. can, couldn’t
( ) ___________ nice the watch is !
( )
( ) _____ your brother _______ his holidays in Beijing next year?
( ) It’s cold here. Please keep the window __________.
( )Simon heard his neighhour ________ for help at night.
( )An old friend of my sister’s always helps my brother and ______ with _________ lessons.