1.The manager promised to keep me＿＿of how our business was going on.A.to be informed B.to inform C.informed D.informing2.The USA is＿＿ the south of Canada and＿＿the east of Japan.A.on;to B.in;to C.in;on D.to;in麻烦写出句子意思和所

1.The manager promised to keep me＿＿of how our business was going on.A.to be informed B.to inform C.informed D.informing2.The USA is＿＿ the south of Canada and＿＿the east of Japan.A.on;to B.in;to C.in;on D.to;in麻烦写出句子意思和所
1.The manager promised to keep me＿＿of how our business was going on.
A.to be informed B.to inform C.informed D.informing
2.The USA is＿＿ the south of Canada and＿＿the east of Japan.
A.on;to B.in;to C.in;on D.to;in
麻烦写出句子意思和所远答案的详细理由，

1.The manager promised to keep me＿＿of how our business was going on.A.to be informed B.to inform C.informed D.informing2.The USA is＿＿ the south of Canada and＿＿the east of Japan.A.on;to B.in;to C.in;on D.to;in麻烦写出句子意思和所
请给出题