2. Choose the proper form:Gerund, Gerund + preposition or preposi- tion + Gerund and fill in the blanks. 1. __ the surface of the country is of great importance. A. by mentioning C. on mentioning B. mentioning D. after mentioning 2. Highland Britain is worth __ A. of seeing C. in seeing B. seeing D. on seeing 3. The UK continues __ commerce. A. with succeeding C. in succeeding B. succeeding with D. succeeding in 4. The UK succeeds __ one of the important commercial centres of the world. A. remaining C. on remaining B. in remaining D. remaining in 5. The English people started __ their national flag 'the Union Jack long ago. A. naming C. on naming B. with naming D. in naming 6. The country people went __ their mother tongue. A. on speaking C. of speaking B. with speaking D. by speaking 7. The Welsh people have a habit __ their mother tongue. A. in speaking C. speaking B. on speaking D. of speaking 8. __ the thistle as the national emblem of Scotland , Scotsmen began to wear it on their jackets. A. without choosing C. in choosing B. choosing D. on choosing 9. One can't describe the surface of the country __ lakes and rivers. A. with mentioning C. on mentioning B. without mentioning D. in mentioning