Visitors to the hills are greeted by signs        them to look out.
#89693
A
warn
B
to warn
C
warning
D
warned
推荐题目
Though_____ money, his parents managed to send him to university.
#94909
A
lacked
B
lacking
C
lacking of
D
lacked in
People couldn’t help ______ the foolish girl.
#97555
A
laugh at
B
to laugh at
C
laughing at
D
laughing :
The discovery of new evidence led to _________. 
#98096
A
the thief having caught
B
catch the thief
C
the thief being caught
D
the thief to be caught