The number 9.11 is a special number, , I think, that will be remembered by the Americans forever.
| A．what | B．it | C．which | D．one |
During the tourist season, there are many people wandering in this city to see the old
castles _____ in the sixteenth century.
| A．to be built | B．being built |
| C．having been built | D．built |
_______ 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 |