At our great sale, we have skirts ________ red ________ 20 dollars.
| A．in; for | B．in; in |
| C．for; for | D．for; in |
— I didn’t know you were friends with Mr. Smith.
— We ______ each other for6 years.
| A．knew | B．are known | C．have known | D．will know |
When I was a boy, I often ______ to play in that park.
| A．went | B．have gone | C．go | D．will go |
— ______ do you go to the gym?
— Once a week.
| A．How far | B．How often | C．How long | D．How soon |
Nowadays it’s very useful ______ a foreign language.
| A．learn | B．learned | C．to learn | D．learns |
His English is as ______ as his Chinese.
| A．good | B．better | C．best | D．the best |