The museum is quite far. It will take you half ________ hour to go there by ________ bus.

1. A.
   an; ×
2. B.
   an; a
3. C.
   a; ×
4. D.
   ×; ×

The museum is quite far. It will take you half _____ hour to go there by ______ bus.

A. an, /　　　　　　B. an, a　　　　 C. a, /　　 D. /, /

The museum is quite far. It will take you half ________ hour to go there by ________ bus.

[　　]

The museum is quite far. It will take you half ________ hour to go there by ________ bus.

[　　]

The museum is quite far. It will take you half ________ hour to go there by ________ bus.

[　　]