1.
a. There are two caps.
b. There are two dresses.
c. There (are) a pair of socks (или 2 socks).
d. There are two skirts.
e. There are five scarfs.
f. There (are) a pair of slippers (или 2 slippers).
2.
2. In picture A there is one cap. In picture B there are two caps.
3. In picture A there is one sock. In picture B there are two socks.
4. In picture A there is one dress. In picture B there are two dresses.
5. In picture A there is one train. In picture B there are two trains.
6. In picture A there is one sock. In picture B there are two socks.
7. In a picture A there are two boxes. In the picture B there is one box.
8. In a picture A there are two balls. In the picture B there is one ball.
9. In a picture A there are two bathrobes. In the picture B there is one bathrobe.