A. itself B. heat up C. biologist D. system A. congestion B. assistant C. spacecraft D. encouragement A. disappointed B. distraction C. drawer D. believe A. weakness B. weaken C. eighth D. go to college A. method B. tool C. that D. preparation A. north-east B. compare with C. take part in D. rubber A. bridegroom B. misunderstanding C. cable D. desk A. move B. magpie C. accuse D. combine A. reassure B. bring down C. at the end of D. heretic A. walk the dog B. fluency C. accuracy D. reading room