—Perhaps loneliness is one of the biggest problems in our society these days.
— It especially appears among teenagers.
| A．I’m not sure if you are right. |
| B．That’s a good idea. |
| C．I quite agree with you. |
| D．I don’t think so. |
The Greens _____ China for seven years.
| A．have come to | B．have been to |
| C．have come in | D．have been in |
Maria and Tony ____English girls.
| A．are all | B．are both | C．all are | D．both are |
Do you mind _______ the windows?
| A．to open | B．opens | C．opening | D．opened |
.--What happened____you?—I was late for class this morning.
| A．at | B．on | C．to | D．with |
Jenny is going to ____a new hobby next month.
| A．take away | B．take up | C．take off | D．get up |