A.appearedB.vanishedC.lostD.enteredAnne（）from outside h……

单项选择题The aircraft vanished without（）

A.trace
B.trouble
C.destination
D.product

单项选择题There were several wet（）on the wall.

A.parts
B.decreases
C.patches
D.decks

单项选择题Houston experienced a（）growth after the war.

A.broad
B.mechanical
C.wide
D.spectacular

单项选择题The train's about to leave. All（）!

A.aboard
B.on
C.off
D.abroad

单项选择题She invited 500 people（）her beautiful ship.

A.abroad
B.aboard
C.board
D.broad