In the global economy, a new drug for cancer, it is discovered, will create many economic possibilities around the world.
| A．whatever | B．whoever | C．wherever | D．whichever |
The number of people invited _________ fifty, but a number of them __________ absent for different reasons.
| A．were; was | B．was; was | C．was; were | D．were; were |
Someone called me up in the middle of the night, but they hung up_________I could answer the phone.
| A．as | B．since | C．before | D．until |
The WTO can’t live up to its name _________ it doesn’t include a country that is home to one fifth of mankind.
| A．as long as | B．while | C．if | D．even though |
There were dirty marks on her trousers__________she had wiped her hands.
| A． where | B． which | C． when | D． that |
The English play__________my students acted at the New Year’s party was a great success.
| A． for which | B． at which | C． in which | D． on which |