The maths problem was so difficult that none of us could ____.
They thought __________ important to look right and left when ________ the road.
---What do you think of her dress?---I think it still looks quite fashionable on her ____ it is a style of many years ago.
Sometimes I find it necessary to ______ at night because of too much homework.
---What do you think of the film? ---Wonderful! You_______ praise it_______ much
---Are you clear about the trip next Saturday? --- One more thing.1 want to know_______.