—How long have you ______the computer?
—For about half a year.
A bought B found C had D borrowed
________ I got on the bus, he got off.
| A．As | B．While | C．Until | D．Till |
Not only the kids but also the teacher ________. We are worried because time is running out.
| A．has lost | B．has gone missing | C．have lost their way | D．have disappeared |
My father has a habit of jogging ________ the Dongcheng River for an hour in the evening.
| A．against | B．beyond | C．through | D．along |
It is said that the terrible weather will ________ for another week.
| A．last | B．change | C．stay | D．become |
Frank often wears a mask ________he can keep fit in the foggy and hazy (霾) weather.
| A．only if | B．until | C．so that | D．even though |