（届陕西省五校联盟高三第二次模拟考试英语试卷）
Be careful when you deal with this chemical, as it will explode when ______ to sunlight.
| A．exposed | B．to expose | C．exposing | D．being exposed |
----Did you happen to see ____ black and ____ white cat?
----Is she missing? I told you to take care of her.
| A．the; the | B．the; / | C．a; / | D．a; the |
Apples are usually sold by ________ weight and eggs are sometimes sold by ________ dozen.
| A．the; the | B．/;a |
| C．/; the | D．the; a |
— Did you happen to see _______ black and _______ white cat?
— Are they missing? I told you to take care of them.
| A．a; 不填 | B．the; 不填 | C．the; the | D．a; the |
Many people agree that ______ knowledge of English is a must in _______ international trade today.
| A．the, an | B．a, 不填 | C．the, the | D．不填, the |
As is known to us all, _____ tiger is in _____ danger of becoming extinct.
| A．the, a | B．the, 不填 | C．a, 不填 | D．不填, the |