All passengers _______, please fasten your seat belts and remain seated _______ the plane is landing.
| A．on board; until | B．abroad; since | C．on the board; before | D．aboard; when |
相关试题
----It seems that I shall never achieve my goal, Mum.
----Don’t lose heart, dear. You know___________.
| A．failure is the mother of success |
| B．action speak louder than works |
| C．great minds think alike |
| D．a good beginning is half done |
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