— Mary had an accident on her way to home yesterday．
— ? She is always careful．
| A．How come | B．Why not | C．So what | D．What for |
________the new economical policy，he expanded his business and made more profits than before.
| A．Benefiting from | B．Benefited from |
| C．Having benefiting | D．To benefit |
As expected，the program is actually slowing down due to a________budget.
| A．flexible | B．complex |
| C．adequate | D．tight |
－Jeffery seems to go without proper food and sleep for days.
－Leave him alone.That's________he reacts to a lost love.
| A．what | B．how |
| C．why | D．when |
She________the opportunity，but unfortunately she just let it go.
| A．should have taken | B．must have taken |
| C．needn't have taken | D．can't have taken |
I don't remember who came first，but we all________the lecture.
| A．attend | B．attended |
| C．have attended | D．are attending |