单项选择题
Probably there"s a good reason for her absence, as she doesn"t usually stay away from work.
单项选择题 There is nearly one million dollars that this suspect could not account for.
单项选择题 The English abstract of your thesis leaves much to be desired, so you have to rewrite it.
单项选择题 Obsessed with their research on superconductive material, they were oblivious ofthe goings-on around them.
