用所给词的适当形式填空

1. Look! Whose ________ (Walkman) are these? Perhaps they are the twin's.

2. Is there an ________ (electric) shop in your town?

3. Amy wants to buy some presents for ________ (they).

4. Do you understand the ________(mean) of the new world?

5. Do you like to have cold ________ (drink)?  

6.We usually go ________ ( shop )on Sundays.

7. Listen !Someone ________ ( knock )at the door.

某药在多次应用了治疗量后，其疗效逐渐下降，可能是患畜产生了( )。

A．耐受性

B．抗药性

C．过敏性

D．快速耐受性

E．快速抗药性