. ------ The door was open.
----- It ___________open. I had locked it myself and the key was in my pocket.
| A．can’t be | B．mustn’t be | C．can’t have been | D．mustn’t have been |
John Snow found that the polluted water was _________ for the outbreak of cholera.
| A．to blame | B．to be blamed | C．blamed | D．blaming |
--Good afternoon. Can I help you?
--My bike is broken. I’d like to have it______, sir.
| A．repaired | B．repairing |
| C．to repair | D．to be repaired |
________by the beauty of nature, the girl from London decided to spend another two days on the farm.
| A．Attracting | B．Attracted |
| C．To be attracted | D．Having attracted |
With a lot of difficult problems _________, the manager felt worried all the time.
| A．settled | B．to be settled | C．settling | D．to settle |
_____ was obvious ______ the manager was waiting for LiFang to leave.
| A．It, that | B．This, that | C．That, what | D．What, that |