His proposal is very _____. We do not need any explanation.
| A．abstract | B．faithful | C．loyal | D．concrete |
_______ which way to take, the little boy behaved like a real gentleman who comforted his
sister from time to time.
| A．Leaving to wonder | B．Having left to wonder |
| C．Left wondering | D．Left to wonder |
He doesn't know what to say, for it is the first time that he ______ with a girl.
| A．went out | B．goes out | C．has gone out | D．had gone out |
There were many more people who got injured in the big fire than _______.
| A．was reported | B．it was reported |
| C．were reported | D．they were reported |
This robot is supposed to save a lot of labor, but it remains a problem if it ______.
| A．is | B．saves | C．does | D．has |
George applied for the position three times ______ he finally got it.
| A．before | B．until | C．when | D．after |