She had to drop out of school _____ her family couldn’t afford the cost of her education.
| A．although | B．unless | C．because | D．so |
The exam result will be _______ on Friday afternoon.
| A．put up | B．put away |
| C．put off | D．put on |
Mr. Smith left home and went to Shenzhen in his twenties, where he _______ until the 1990s.
| A．stayed | B．had stayed |
| C．has stayed | D．were staying |
. After a heated discussion, the committee finally worked out one _______ to solve the problem.
| A．approach | B．means | C．method | D．way |
The number of foreign students attending Chinese universities ______ rising step by step since 1999.
| A．is | B．are | C．has been | D．have been |
The professor held the crucible the Bunsen flame when heating the substance.
| A．in | B．above | C．beside | D．over |