The professor paused as if ___________ his students to ask questions on the point he had just made.
| A．expecting | B．is expecting | C．expected | D．to have expected |
Studies show that people are more ______ to suffer from back problems if they always sit before computer screens for long hours.
| A．likely | B．possible | C．probable | D．sure |
I’m sure your suggestions will _____ the problem.
| A．contribute to solving | B．contribute to solve |
| C．be contributed to solve | D．be contributed to solving |
______ in the sandstorm, he didn’t know which way to take.
| A．Having stuck | B．Stuck | C．To be stuck | D．Sticking |
He joined the firm as an office boy, but he gained rapid promotion, and _____ a director.
| A．ended up | B．ended up in | C．ended up with | D．ended up as |
Leaders of many countries have been trying to ______ what it is that makes China develop so fast.
| A．carry out | B．figure out | C．watch out | D．go out |