Sandra was a student ____ the age of 21.
| A．at | B．in | C．on | D．for |
---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 |
The more you smile, the ________ you will feel.
| A．happy | B．happier | C．happily | D．more happily |
He often borrows money ________ others, but he doesn’t lend anything _ ________ anybody.
| A．from;from | B．to;from | C．from; to | D．to;to |