_________ dangerous it is for a child to swim alone in a river!
A. What B. What a C. How
I saw himwhen I passed by.
| A．ran | B．to run | C．running | D．run |
Bob used to ________in the countryside . But now he is used to _________in the big city .
| A．live; living | B．living ; living | C．living , live | D．live,live |
---You’d better not eat too much salt. It's bad for your health.
---- _______________.
| A．Not at all. | B．You’re welcome. |
| C．It doesn’t matter | D．Thanks for your advice |
Yesterday, they talked about something important _______ the phone.
| A．in | B．of | C．from | D．on |
His father told him ________ his best friend to dinner this Sunday.
| A．invite | B．ask | C．to invite | D．asking |