—How long would you like me to heat the oil?
—Heat it till it ________ to smoke.
| A．would start | B．starts |
| C．will start | D．start |
His parents wouldn’t let him marry anyone ______ family was poor.
| A．of whom | B．whom | C．of whose | D．whose |
From his _______ look, we could see that he hadn’t expected that we could raise such _______ questions to him.
| A．confused; confusing | B．confusing; confused |
| C．confusing; confusing | D．confused; confused |
In the face of ______ failure, it is the most important to keep up ______ good state of mind.
| A．/; a | B．a; / | C．the; / | D．/; the |
The police are ______ to conclude that the cause of fire was a cigarette end.
| A．probable | B．possible | C．maybe | D．likely |
Last winter, many places of southern China were struck by heavy snowstorms, _____ more than 120 people were killed.
| A．from which | B．in which | C．at which | D．for which |