The committee (A. has been arguing B. have been arguing) over the problem among themselves for two hours.
A: has been arguing
B: have been arguing
A: has been arguing
B: have been arguing
举一反三
- They have been ________ over this issue for hours. A: argue B: argues C: argued D: arguing
- The meeting has ___ for two hours. A: begun B: finish C: been on over D: over
- All possible means ，but not a means an obvious effect。 A: have been tried; has B: have tried; has C: has been tried; have D: have been tried; have
- The committee ______ over the problem among themselves for two hours.
- John__________havingdonesomethingwrong. A: have been aware B: has been aware of C: has been awared of