We ______ last night, but we went to the concert instead.
| A．must have studied | B．might study |
| C．should have studied | D．would study |
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 |
I hate __________ when peope talk with their mouths full.
| A．it | B．that | C．these | D．them |
—I drove to Zhuhai for the air show last week..
—Is that _________ you had a few days off ?
| A．why | B．when | C．what | D．where |