Your trousers____ dirty.You must have____ washed.
|
A．is;il |
B．are;it |
C．are;them |
D．is;them |
Theis is one of the most interesting questions that ____ asked.
|
A．have |
B．has |
C．have been |
D．has been |
A chemical works____ built there.
|
A．is to being |
B．have been |
C．were to |
D．has been |
Chairman Mao' s works ____ published.
|
A．has been |
B．have been |
C．was |
D．is |
The Arabian Nights ____ well known to the English.
|
A．is |
B．are |
C．was |
D．were |
The number of deer, mountain lions and wild roses ____ much if people leave things as they are.
|
A．doesn' t change |
B．don't change |
C．change |
D．changed |
