Tom has been out of work for two years, so he has difficulty______. 
#97290
A
earning living
B
earning his living
C
to earn livings
D
to earn his living
推荐题目
 Paul does nothing but _____ all day long.
#97507
A
play
B
to play
C
playing
D
played
 She said she was sorry _____ the train, so she had to stay here for another day.
#98326
A
missing
B
having missed
C
to miss
D
to have missed
Genius is a complicated concept ,          many different factors.
#90684
A
involved
B
involving
C
to involve
D
being involved