Having searched online for hours, the team finally ____________ about the causes of the problem.
举一反三
- 18. _________ the library for hours without finding anything useful, I turned to my professor for help. A: To search B: Having searched C: Have searched D: Searching
- they searched for hours, but ____be found.
- After having tried different ( ) to the problem, we finally solve it. A: drafts B: schedules C: approaches D: plans
- 进行测试找到问题的原因。 A: Do the test to find the cause of the problem. B: Do the test to make the cause of the problem apparent. C: Do the test to decide about the reason of the problem. D: Do the test to detect the reason of the problem.
- The rescue team must have searched for the missing visitors in the earthquake two days ago, ________ ?