The reason he didn’t come last night was he was ill.
| A．why；that |
| B．that；why |
| C．for that; that |
| D．for which; what |
The old town has narrow streets and small houses __________ are built close to each other.
| A．they | B．where | C．what | D．that |
Thisis the best book __________ I've ever bought.
| A．that | B．who | C．with which | D．which |
The girl is familiar to me. Maybe she is the girl __________ Imet in the street yesterday.
| A．which | B．whom | C．as | D．what |
I have bought the same dress __________ she is wearing.
| A．as | B．that | C．which | D．than |
He often helps the students __________ he thinks are notquick at their studies.
| A．whom | B．who | C．when | D．because |