21.【2012届浙江杭州重点高中原创模拟】13. ___________ the consequences of the chemical leaks, the specialists haven’t given final conclusion before they obtain accurate statistics.
A. With regard to B. As a result of C. In spite of D. In addition to
22.【2012届江西省六校联考】30. —You ought to have made an apology to Tom yesterday evening．
—Yes, I know I __ ．__
A．ought to have B．have to C．should D．must have
