The play had already been on for quite some time when we __ at the New Theatre.
| A．have arrived | B．arrived | C．had arrived | D．arrive |
Whoever breaks the law .
| A．must have punished | B．will be punished |
| C．has been punished | D．are punished |
I wonder it is has made me I am now.
| A．what ; that ; what | B．what ; that ; that |
| C．that; what; what | D．what ; what ; what |
Not until we left our school how warm it was there.
| A．had we realized | B．did we realize |
| C．have we realized | D．realized we |
Ms. Romero is the first person known with Ebola outside of Africa.
| A．to infect | B．to be infected |
| C．infecting | D．to have become infected |
The university graduates from ordinary families are often left with nothing but diplomas， those from wealthy ones can "gnaw" （啃老）on their parents' money and networks to get ahead.
| A．while | B．when | C．which | D．Although |