16. Are you sure you told me? I can’t recall ________about it. A. having told B. having been told C. to have told D. to have been told 17. Men have ________fatal accidents as women do for every mile they drive. A. twice more B. twice as many C. as twice many D. as twice 18. ________nights without sleep make any new parent feel ready to quit. A. Lonely B. Sleepless C. Successive D. Tired 19. Theoretically, no country can allow the listed animal in without an export ________. A. permit B. permission C. permitting D. permissiveness 20. Our first attempt didn’t work, and ________. A. our second didn’t work too B. our second didn’t, neither C. our second neither D. neither did our second 21. When I joined the club, I found it difficult to _____instruction from my coach, but I soon got used to it. A. call B. carry C. follow D. conduct