Monkeys in the zoo started to show the flu _____ last Monday and altogether twenty have died up to now．
#6151
A
symbol
B
sign
C
signal
D
symptom
推荐题目
The mountains form a natural between the two countries so they have no trade relations in history.
#6961
A
exchange
B
bridge
C
barrier
D
fence
At the __________ of the gun,the runners dashed from their starting points.
#7006
A
sight
B
hearing
C
sound
D
shot
You have been sitting on my hat and now it is badly out of _____ .
#7461
A
date
B
shape
C
order
D
balance
The police have started an ___ into the cause of the fire which broke out in the hotel last night.
#6545
A
appreciation
B
investigation
C
operation
D
extension