It was not until I reached my apartment building and unlocked the door __________ what the noise had been.
| A．that did I realize | B．before I realized |
| C．that I realized | D．did I realize |
loose
| A．shoot | B．outdoors | C．football | D．wool |
accent
| A．official | B．recover | C．recognize | D．pace |
exactly
| A． expression | B． example | C． exhibition | D． exchange |
organize
| A．design | B．college | C．ignore | D．charge |
-_____you sing and dance at this late hour of the night?
-Sorry, I will stop right now.
| A．May | B．Shall | C．Will | D．Must |