It was in 1990 ______ the medicine was tested on human patients.
| A．since | B．that | C．before | D．when |
_____ interested her most was the longitude line. It’s an imaginary line ______ the eastern and western halves of the world.
| A．That; dividing | B．What; divided | C．That; divided | D．What; dividing |
They had no time to arrange their own wedding, so they had it ______ by a company.
| A．organize | B．organized | C．organizing | D．be organized |
Northern Ireland, England and Scotland have different educational and legal systems _____ different football teams for competitions like the World Cup!
| A．as if | B．as to | C．as well as | D．as for |
I feel it is you rather than the girl who_____ for being late for the speech.
| A．is to blame | B．are to blame | C．is to be blamed | D．are to be blamed |
He knew that cholera would never be controlled _____ its cause was found.
| A．till | B．still | C．until | D．kill |