According to the bill, how can customers pay their bills online？
A．By filling out a form
B．By visiting a Web page
C．By e-mailing customer service
D．By calling a customer service hot line

A．Librarian.
B．Lawyer.
C．Teacher.
D．Trainer.

A．4.
B．8.
C．12.
D．15.

In the passage, relations between the United States and Colombia was __ .
A．friendly
B．sincere
C．true
D．terrible

What colors are commonly seen in the auroras？ Click on two answers．
A．Orange
B．Red
C．Green
D．Brown

I could not but admit that it was a wise decision．
A．我不能承认那是个明智的决定。
B．是不是明智的决定我有点犹豫不决。
C．我不得不承认那是个明智的决定。
D．别人说是一个明智的决定，我也承认如此。