While the soldier’s idea was interesting, the system was too difficult to be ____.
#14179
A
of practical use
B
practical usefully
C
practice use
D
practice used
推荐题目
If you don’t get up early, you’ II ____the bus.   
#14290
A
not miss 
B
miss  
C
catch
D
lost
---Where is the nearest hospital? --- Not very far. It is _________.
#14172
A
within an hour’s flying time
B
within 10 minute’s walk
C
within 5 minutes’ drive
D
within 10 minutes walk