Wang Xing can play the guitar, but she can’t play________.

I find ________ difficult to remembereverything, though I’m still young.

When did you buy this computer It looksso new.—I itfor only a couple of days. My sister bought it for me as a birthday present.

______ of years later, the first extremely small plants began to appear on the surface of the water.

canI do for you, sir— I want_____