______they have been working hard to find?
A: Is that what
B: Is that
C: It is that
D: Is it that
A: Is that what
B: Is that
C: It is that
D: Is it that
举一反三
- 他们正在努力寻找和平解决这种冲突的方法。(solution) A: They working hard to find a peaceful solution to the conflict. B: They were working hard to find a peaceful solution to the conflict. C: They are working hard to find a peaceful solution to the conflict. D: They worked hard to find a peaceful solution to the conflict.
- By the end of next month I ______ here for 20 years exactly. A: have been working B: shall have been working C: would have been working D: has been working
- His promotion was due to ______ he had been working hard（ ）. A: what B: the fact that C: that D: the fact which
- He failed the exam, ______ proved that he hadn’t been working hard enough. A: [A] that B: which C: what D: of which
- 中国大学MOOC: I have been working so hard all day that I really need to ______.