We can have ______bluer sky if we create_ ____less polluted world.
| A．a; a | B．a; the | C．the; a | D．the; the |
— I hope to take the computer course.
— Good idea. ____ more about it, visit this website.
| A．To find out | B．Finding out |
| C．To be finding out | D．Having found out |
I still remember my happy childhood when my mother ______ take me to Disneyland at weekends.
| A．might | B．must |
| C．would | D．should |
The manager was satisfied to see many new products ______ after great effort.
| A．having developed | B．to develop | C．developed | D．develop |
By now, we have raised 50.000 pounds for the poor children, ______ is quite unexpected.
| A．that | B．which | C．who | D．it |
Was it because Jack came late for schoolMr. Smith got angry?
| A． | why | B． | who | C． | where | D． | that |