He finished ______the book yesterday evening.
As is known to all language learners, newly learnt words will soon be forgotten unless ______ used in everyday communication.
This approach, ______ more expensive than the basic one, provides us with considerably more usage flexibility.
______ would have been too embarrassed, but he walked right up and asked for her autograph.
German Chancellor Angela Merkel says united Europe could fail if Eurozone(欧元区) ______ over debt problems in Greece, Italy and other weaker economies.
Education is not an end, but a means to an end. ______, we do not educate children only for the aim of educating them.