Mr. Green works in office, but his sister works a farm.A.a, in B.an, in C.an, on
Eddie is eight years old, but we have seven candles only, we need______ candle.
I hope you ________ me with my English.
China is larger than ________ country in Africa(非洲).
I will go to the teacher for ________ about my English learning.
She is ready to help people ________.