We're still at the airport. If it weren’t for the delayed flight, we _____the concert right now.
| A．can be enjoying | B．must have enjoyed |
| C．would be enjoying | D．should have enjoyed |
It was not until 1920 ___ regular radio broadcasts began.
| A．while | B．when | C．that | D．since |
The reason _____ he explained is ___ she was ill.
| A．that , that | B．which , that | C．why,because | D．why, that |
_______, the disease diphtheria would produce a powerful poison that would kill the paient.
| A．If untreated | B．If it untreated | C．To be untreated | D．If being untreated |
He ___ in Nanjing where he ____ by his aunt.
| A．grow,grow up | B．grew up, grown | C．grew up , was brought up | D．grew,fed up |
They are of _____ height, but I think Mary ____ the job.
A.equally,is equal B.equal, is equal to Ｃ．equal, equals D.equally, is equaled