You can’t imagine the difficulty he _____ onto the cliff and saving the boy in trouble. 
#103306
A
had to climb
B
had climbed
C
had climbing
D
had on climbing
推荐题目
Pompeii _______ by so many tourists that some of the relics are not well protected. 
#102918
A
has been visited
B
is visited
C
is visiting
D
was visited
Catherine came home happily, which suggested that she        the final exam.
#102510
A
had passed
B
pass
C
would pass
D
should pass
  I stood there patiently until he ________ his work.
#103684
A
has finished
B
would finish
C
had finished
D
finishes