剛參加完成考，有道題不太明白，希望能有會的人幫我解釋一下we should be grateful if you would reply at your ----convenience.A。early B。earlier C。earlist D。還有一個答案忘了這3個應該選哪個?。课疫x的B對嗎
選A
I agree them
我看也應該是A
