David did it ()to annoy her.
A. on purpose
B. in need
C. in detail
D. at all
查看答案
A great cheer went up from the crowd as they caught () of the hero.
A. vision
B. view
C. sight
D. glance
()we can succeed or not depends on how well we cooperate.
A. Then
B. Thus
C. What
D. Whether
Mr. Brown is supposed to ()for Italy last month.
A. be leaving
B. have left
C. leave
D. have been left
It is () to stare directly at the sun.
A. harmful
B. harmless
C. comfortable
D. safe