27. The glass vessels should be handled most carefully since they are _______.

    A) intricate    C) subtle

    B) fragile D) crisp

28. Hill slopes are cleared of forests to make way for crops, but this only _______ the crisis.

    A) accelerates  C) ascends

    B) prevails D) precedes

29. He blew out the candle and _______ his way to the door.

    A) converged    C) strove

    B) groped   D) wrenched

30. Often such arguments have the effect of _______ rather than clarifying the issues involved.

    A) obscuring    C) tackling

    B) prejudicing  D) blocking