11. Though__________money,his parents managed to send him to university.
[A]lacked
[B]lack of
[C]lacking
[D]lacked in
12. Something must be done. There will not be enough space even to stand __________ the earth.
[A]in
[B]on
[C]in on
[D]on in
13. --"Cars and buses burn oil. "
--__________
[A]So do many other machines
[B]Many other machines do so
[C]So many other machines do
[D]Many other machines so do
14. John and Sue __ computer games for hours before their parents came home from work
[A]are playing
[B]have been playing
[C]played
[D]had been playing
15. -- Would you mind holding the door open for me, please?
--__________.
[A]Don’t mention it
[B]Oh, with pleasure
[C]Well, that’s all right
[D]Thank you all the same
