theory
n. 理论；原理

traditional
a. 传统的，惯例的

writer
n. 作者，作家，文学家

be responsible for
对…负责

have sth. to do with
与…有关

even if
即使

see no reason for sth.
认为（做）某事毫无理由

make good use of
充分利用

have a problem doing sth.
做某事有困难

so far
迄今为止

Merry Learning

Funny Answers

1. How can a reader become rich?
By making notes of everything he reads.
2. Why isn't the stadium air-conditioned?
Because it's full of football fans.
3. Why do you like the river so much?
Because there is a bank on either side of it.
4. Why are all table tennis matches held after 7 p.m.?
Because the bats come out only at night.