11. Madonna ______ a straight–A student, but it was dancing that she was really crazy about.
| A．must be | B．could be |
| C．must have been | D．could have been |
______ the terrible pollution, so many beautiful fish are fast disappearing in the river.
| A．According to | B．Because of | C．Because | D．As a result |
All of us found ______ difficult to work out the maths problem.
| A．what | B．that | C．which | D．it |
Doyouhappentoknow________?
| A．whereisheraddress | B．inwhichplaceisheraddress |
| C．whatheraddressis | D．theplaceheraddressis |
Let Tom play with your toys as well, Clare—you must learn to_______.
| A．support | B．care | C．spare | D．share |
Johnaskedme_______tovisithisuncle’sfarmwithhim.
| A．howwouldIlike | B．ifornotwouldIlike |
| C．whetherIwouldlike | D．whichIwouldlike |