问题
Is there a vaccine _____ pig influenza?, I’m anxious to know—– Don’t worry, there is a vaccine _____ for pigs against pig influenza
A:for; available
B:against ; use
C:to; access
D:against; available
B:against ; use
C:to; access
D:against; available
正确答案是：
同类题型
I would appreciate ___________, to be frank, if the goods could be delivered as soon as possible.
The US is China’s biggest export market, ________ more than 70 percent of China’s exports.[ ]
It is not until midnight ______ he goes to bed every day.
Ifyou have a job，____________yourself to it andfinally you’ll succeed