【題組】77. (A)unless (C)or (B)while (D)so
【題組】78. (A)constructed (C)collaborated (B)correlated (D)coordinated
【題組】79. (A)how (C)that (B)when (D)why
【題組】80. (A)elevate (C)propel (B)inject (D)foster
【題組】81. (A)at (C)toward (B)to (D)under