_________ the lecture going on, the students got more and more interested.
| A．With | B．While | C．During | D．As |
The Titanic, the biggest ship of its day, ____ unsinkable, but it sank on its first voyage in 1912.
| A．thought | B．was thought | C．thought it | D．was thought it |
We'd better get up earlier than usual if we want to catch the train, ____?
| A．didn't we | B．hadn't we | C．wouldn't we | D．don't we |
I once heard him ____ that a rainbow (彩虹) was a bridge from earth to heaven.
| A．said | B．say | C．to say | D．was saying |
____, the amount left in the bank is hardly worth mentioning.
| A．Having paid my taxes | B．Paying my taxes |
| C．My taxes having been paid | D．My taxes had been paid |
If the man is only interested in your looks, _____ just shows how shallow he is.
| A．as | B．which | C．what | D．that |