— What made you so upset?
— ______ the exam.
| A．Failing to pass | B．To fail passing |
| C．Failing passing | D．To fail to pass |
Liu Xiang is ________ Yao Ming.
| A．as a famous athlete as | B．as famous an athlete as |
| C．so a famous athlete as | D．as famous an athlete so |
When and where to go for the on-salary holiday _____ yet.
| A．are not decided | B．have not been decided |
| C．is not being decided | D．has not been decided |
The water will be polluted unless some measures _____.
| A．will be taken | B．are being taken | C．are taken | D．were taken |
His way of speaking suggested that he ____ very angry.
| A．should be | B．be | C．is | D．was |
Pine trees, of which there are almost one hundred ____, are found throughout the North Temperate Zone.
| A．species | B．samples | C．specimens | D．Standards |