问题补充:
单选题Allpassengers______,pleasefastenyourseatbeltsandremainseated______theplaneislanding.A.on board; beforeB.abroad; sinceC.on the board; afterD.aboard; when
答案:
D
时间:2020-02-10 09:27:32
单选题Allpassengers______,pleasefastenyourseatbeltsandremainseated______theplaneislanding.A.on board; beforeB.abroad; sinceC.on the board; afterD.aboard; when
D