We are ____________ the Great Wall this weekend.
A. going to
B. going
C. to
The old man is talking ____________ the children how to keep a pet dog.
A. about
B. to
C. for
—What are you doing?
—____________.
A. I'm read a book
B. I'm fine
C. I'm reading a book
My mom is taking pictures ____________ the beautiful flowers.
A. for
B. to
C. of
选择正确的选项，补全单词
pr __ __ tice
A. ac
B. aa
C. oc