All the neighbors think highly of this family, _________ the parents are treating their child like a friend.
| A．why | B．where | C．which | D．that |
--- Hi, Lucy．Do you know where Linda is?
--- She in the library．I saw her there just a few minutes ago．
| A．shall be | B．must be |
| C．should have been | D．might have been |
I the office yesterday afternoon when a stranger came in with a boy．
| A．left | B．was about to leave |
| C．was to have left | D．will leave |
Professor Tang didn’t give us a speech today．It washe had a traffic accident on the way to school．
| A．that | B．when | C．why | D．because |
--- Have you heard that George quit his job?
---Yeah, but I can’t why he did so．
| A．put out | B．figure out | C．carry out | D．send out |
--- Tony, you must have noticed the student who broke the glass．
--- I’m sorry．I attentively．
| A．studied | B．was studying | C．am studying | D．would study |