Historical experience can as a most important source of information.
| A．serve | B．use | C．regard | D．prove |
It was thirty years _______ he was invested as an outstanding alumnus to celebrate the 128th anniversary of the university.
| A．as | B．while | C．before | D．until |
Frankly speaking, in many countries _______ is called "equality" does not really mean equal rights for all people.
| A．which | B．that | C．what | D．Where |
Clearly there is much to be desired _____ it comes to the quality of teachers and their teaching methods.
| A．when | B．since | C．until | D．although |
Don’t let such an unimportant matter as this come between us _____ we can concentrate on the major issue.
| A．so that | B．in case |
| C．because | D．on condition that |
Despite the rule _____ mobile phones are forbidden in class, my deskmate can’t help playing phone games occasionally.
| A．which | B．what | C．that | D．where |