1) It must have been the wind.
这一定是风声。
2) You bet it is
一定是这样。
3) It certainly is this key.
一定是这把钥匙。
4) It must is a kite.
一定是个风筝。
5) It Must Be Fake Food
这一定是伪劣食品
6) Listening this wind.
听这风声。
参考词条