We may find that learning a foreign language does not have to be________learning our mother tongue,but can in fact be twice ________.
In fact , the hazy weather problem is so severe now that it has aroused __________ nationwide concern about __________ environmental pollution .
– I spent three hours buying a train ticket at the railway station the other day .-- Why ? You __________ one on the Internet or by phone .
The newly married couple couldn’t afford to buy a new car ; __________ , they bought a used one .
– Well , Jack , I am sorry that I have to leave .-- __________ . Let’s email often .
__________ is no possibility __________ Bob can win the first prize in the match .