In April, 2009,President Hu inspected the warships in 
Qingdao, ______ the 60th anniversary of the founding of the PLA Navy.
| A．marking | B．marked | C．having marked | D．being marked |
14. Many new games are designed on the computers all the time; people of all ages ______ these games.
| A．are playing | B．had played | C．have been playing | D．Play |
15. --- Who are the teenagers gathering at the school gate?
--- Well, if you _____ know, they are all my visiting students.
| A．need | B．must | C．may | D．Will |
16. Nothing taught by others can have the same effect on you as _____ learned by yourself.
| A．that | B．what | C．which | D．It |
17. In China, _______ bicycle is ______ popular means of transportation.
| A．the; a | B．a; / | C．the; the | D．a; the |
18. --- What do you think of the furniture on exhibition?
--- Well, great! But I don’t think much of _______ you bought.
| A．the one | B．it | C．that | D．Which |