China's first moon rover, Yutu, or Jade Rabbit touched the lunar surface at 9:14 a.m.on December 14,2013,  ________deep trace on the loose lunar soil.
#89403
A
left
B
leaving
C
Having left
D
To leave
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If you’re a poor driver, you should not_______ at night. 
#95514
A
to try driving
B
try to drive
C
to try to drive
D
try driving
---Why do you look so upset?---There are so many troublesome problems ____.
#94721
A
remaining to be settled
B
remained settled
C
remaining to settle
D
remained to be settled