_____, he has a lot of knowledge about computer.
| A．A child as he is | B．As he is a child |
| C．Child as he is | D．Child as is he |
In any case, parents should make clear _______, if any thing, the children are expected to pay for with the money.
| A．that | B．which | C．what | D．how |
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 |
--- 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 |
Nothing taught by others can have the same effect on you as _____ learned by yourself.
| A．that | B．what | C．which | D．it |
In China, _______ bicycle is ______ popular means of transportation.
| A．the; a | B．a; / | C．the; the | D．a; the |