64、The diversity of tropical plants in the region represents a seemingly ( ) source of raw materials, of which only a few have been utilized.

16.“It’s a shame that the city official should have gone back on his word.” The modal auxiliary SHOULD expresses ( ).

15.“If I were you, I wouldn’t wait to propose to her.” The subjunctive mood in the sentence is used to( ).

14.“I wondered if I could have a word with you.” The past tense used in the sentence refers to a( ).

13.Ms Ennab is one of the first Palestinian( )with seven years’ racing experience.

12.She followed the receptionist down a luxurious corridor to a closed door, ( )the woman gave a quick knock before opening it.

11.( )combination of techniques authors use, all stories—from the briefest anecdotes to the longest novels
—have a plot.

30. The three law ( ) officers on the plane came to the rescue of a fellow passenger who was allegedly trying to kill herself.

29. The store sells liquid vitamins ( ) designed for children under 3.

28. FC Barcelona, ( ) the most iconic club in world soccer, beat Manchester United2-0 to claim the UEFA Champions League title.

27. Electronic cigarettes should be subject ( ) the same taxes and limitations on public use as traditional tobacco products.