It is not polite to those persons in trouble.
| A．laugh to | B．laugh with | C．laugh of | D．laugh at |
--- I have worked harder than before, but I still didn't get good grades in math.
--- Don't worry. .
| A．No problem | B．It takes time |
| C．Pardon me | D．Never mind |
I used to in the river. But now I am used to in the swimming pool.
| A．swim; swimming | B．swim; swim |
| C．swimming; swimming | D．swimming; swim |
We many English words in the last few years.
| A．learn | B．have learned |
| C．will learn | D．learned |
As an excellent student, the boy makes mistakes in his exams.
| A．always | B．usually | C．seldom | D．sometimes |
Kate is girl. She's very happy at school.
| A．a 18-year-old | B．an 18-year-old |
| C．an 18-years-old | D．a 18-years-old |