单项选择题
A.appeared B.vanished C.lost D.entered
The aircraft vanished without（）A.traceB.troubleC.destin...
单项选择题The aircraft vanished without（）
A.trace B.trouble C.destination D.product
There were several wet（）on the wall.A.partsB.decreasesC...
单项选择题There were several wet（）on the wall.
A.parts B.decreases C.patches D.decks
Houston experienced a（）growth after the war.A.broadB.me...
单项选择题Houston experienced a（）growth after the war.
A.broad B.mechanical C.wide D.spectacular
