題目1：有些網路鄉民一旦進入虛擬世界就無法離開電腦(.....have defficulty.....)
Some netizens have difficulty walking away from their computers
once they enter the virtual world.
題目2：雖然這場演唱會的票很貴，但它們還是一天內就銷售一空（......as.....)
Expensive as the tickets to the concert were, they were still sold out
in one day.