2. a.joined b.lifted c.failed d.gained

(a)  

3. a.decided b.produced

c.created d.added

(a)  

4. a.practised b.widened

c.solved d.improved

(a)  

5. enclosed b.seemed c.missed d.pulled

(a)  

6. a.researched b.attacked

c.reached d.required

(a)  

7. a.delivered b.realized

c.attained d.provided

(a)  

8. a.assisted b.shouted

c.accomplised d.created

(a)  

9. a.coughed b.promised

c.gained d.fixed

(a)  

10. a.practised b.enclosed

c.presssed d.looked

(a)