... act as a (an) . a. understudy b. insurgent c. adversary d. go-between > d 22. - "Why is the ground so wet?" - "It last night." a. must rain b. would have rained ... a. as to plan b. according to planned c. as plan d. as planned > d 50 . If I , I would have done better on my test. a. had study 21. A number of members asked me to intercede, but I ... demanded d. required b 15. It is usually lava but gas that kills people during volcanic eruptions. a. not only b. not c. neither d. no >b 16. He retired early ill-health. a. on behalf...