---Why does the boy have few friends?---Because he is_______.
| A．rude | B．kind | C．polite | D．careful |
The little boy wasn't listening _______ in class, so he often missed some important parts.
| A．careful enough | B．enough careful |
| C．carefully enough | D．enough carefully |
It is said that we will have _____ one-day holiday tomorrow, it’s ______ good news for most of the students.
| A．an; a | B．an; a |
| C．a; / | D．a; the |
They had a wonderful time _______________ .
| A．chat on the Internet | B．chatting on the Internet |
| C．chat in the Internet | D．chatting in the Internet |
—How often do you clean the fish tank? — .
| A．This morning | B．Only once |
| C．Twice a week | D．Two days. |