Brussels, the capital of Belgium, is ______ home to the European Union, ______ organization of European nations.
| A． the; an | B．不填; an | C． a; an | D．不填; the |
Those ______ have six or more close friends are described as “very happy”.
| A．whose | B．who | C．which | D．when |
Health experts believe that even a little exercise is far better than ______ at all.
| A．none | B．little | C．everything | D．anything |
______ that I was in trouble, Tom came to my aid without delay.
| A．Learn | B．Learning | C．Learned | D．To learn |
We climbed higher ______ we might see the scenes better.
| A．so that | B．even though |
| C．now that | D．as if |
John seemed puzzled about ______ the question meant.
| A．how | B．why | C．what | D．which |