This kind of exercise is most _______, and therefore is a good test of your students’ ability.
#19644
A
surprising
B
encouraging
C
exciting
D
challenging
推荐题目
 I'd like to be a professional singer, but I don't think I've got__________.
#20580
A
a good voice enough
B
a good enough voice
C
a voice enough good
D
an enough good voice
This book is well worth _______. Would you like to buy one?
#18840
A
to read
B
being read
C
reading
D
to be read
Mr. Lee is ______ to show up at the meeting.
#59563
A
possible
B
likely
C
probable
D
Perhaps