She explained to me________personal computers let everyone explore their own ideas.
| A．that | B．how | C．what | D．where |
It was not until I came here _______ I realized this place was famous for not only its beauty but its weather.
| A．who | B．that | C．where | D．before |
Most Jewish families ________ many difficulties during the Second World War.
| A．went through | B．went over | C．went on | D．went up |
As is reported, it is 100 years ________Qinghua University was founded.
| A．when | B．before | C．after | D．since |
It’s bad manners to keep _______ when your teacher asks you a question.
| A．still | B．silent | C．quiet | D．calm |
_______ was a time _______ women had no right to vote.
| A．There , when | B．There , that | C．It , when | D．It , that |