．—Steve come back because the window is open．
—Yes．but he _______left it open last night．
| A．must have；might have | B．might have；can’t have |
| C．can have；should have | D．might；must have |
Jim is old enough to look after the pet dog ______.
| A．correctly | B．rightly | C．properly | D．accurately |
I never dreamed of ______ such a big crowd here.
| A．there being | B．there to be | C．there having | D．there to have |
Many famous writers are reported ______ long before they started reading themselves.
| A．to have read to | B．to have been read to |
| C．having been read to | D．being read to |
Every time ______ I see the picture there, I think of my days in a remote mountain village.
| A．when | B．while | C．as | D．/ |
Almost all the students were having classes when the earthquake _________.
| A． broke out | B． put out | C． came out | D． got out |