1/ Did you forget …………… your computer off when you left home?

a/ switch
b/ to switch
c/ switching

2/ After the accident, my uncle started driving …………………. in traffic.

a/ slowlier
b/ the most slowly
c/ the more slowly
d/ more slowly

3/ We enjoyed ……………. up with you. We should do it again..

a/ meeting
b/ to meet
c/ meet

4/ In China, perhaps the …………… colour is red. It is the colour of good luck.

a/ most important
b/ the importanest
c/ the most important
d/ the more important

5/ It is one of the …………. problems facing the world today.

a/ significant
b/ most significant
c/ the more significant
d/ the most significant