When and where was sandwich invented from？ 2022-01-06 I have no doubt______he will overcome all his difficulties. 2022-01-06 The rapidly expanding number of automobiles threatens a further escalation in the emission of carbon dioxide. 2022-01-06 A．Knowledge of English. 2022-01-06 The passage is mainly concerned with ______. 2022-01-06 听力原文：M: Alice is supposed to be here at the meeting tonight. 2022-01-06 We can learn from the passage that the poor American life ______. 2022-01-06 A．Sugar. 2022-01-06 The purpose of this passage is to ______. 2022-01-06 听力原文：W: You must have been driving too fast. 2022-01-06