They heard a message from a spacecraft.（用just改現在完成時） They ___ just ___ a message from a s
They heard a message from a spacecraft.（用just改現在完成時）
They ___ just ___ a message from a spacecraft.
Have you got a letter from Lucy?（改同義句）
Have you ____ ____ Lucy?
To understand the problem is very difficult.（用it作形式主語）
_____ _____ very difficult ____ understand the problem.
I came here two days ago.（改同義句）
I ____ ____ here _____ two days.
Her mother has been to HongKong (seveal times).（對括號提問）
_____ _____ _____ has her mother been to HongKong?