写出所给单词的正确形式。

1．My____________(shoe) are under the bed.

2．— Please have a_____________(sit). — Thank you.

3．My bag is old. What about___________(you)?

4．______________(Who) sweater is this?

5．They are white. Please colour______________(they) red.

6．They are the______________(twins) books.

7．It___________(look) like a hat.

8．Excuse_________(I). Are these your coats?

9．The door is____________(lock).

10．Let us__________(look) for a pen.

下图中虚线为等压线且a大于b，以下四处河岸侵蚀较重且此时最可能出现阴雨天气的是（）

A.甲

B.乙

C.丙

D.丁