_____ in the queue for half an hour,Tom suddenly realized that he had left his wallet at home．
A．To wait B．Have waited
C．Having waited D．To have waited
The library needs _____,but it’ll have to wait until Friday．
A．cleaning B．to clean
C．being cleaned D．to being cleaned
--- Catherine, I have cleaned the room for you．
---Thanks．You _______ it．I could manage it myself．
A．needn’t do B．shouldn’t have done
C．mustn’t do D．needn’t have done
It didn’t take the children long to________ the correct answer．
A．carry out B．figure out
C．turn out D．give out
_____ herself to science, the great scientist took little notice _____ the honors given to her．
A．Devoted, of B．Devoting, of
C．Devoted, about D．Devoting, about
The old couple, ____had been admitted to university, were living a hard life．
A．both their children B．both of whom children
C．both of whose children D．whose their children
