Before building a house, you have to ask for the government’s _______.
| A．award | B．permission | C．request | D．excuse |
Allow children the space to express their opinions ________ they are different from your own.
| A．until | B．even if | C．unless | D．before |
A cook will be immediately fired if he is found _______ in the kitchen.
| A．smoke | B．smoking | C．to smoke | D．smoked |
People try to avoid public transportation delays by using their own cars, and this ______ creates further problems.
| A．in short | B．in case | C．in doubt | D．in turn |
—Did you get a ticket?
—No. I______, but there wasn’t any left.
| A．had to | B．attempted to | C．decided to | D．managed to |
We have finished the project finally . No one can imagine the difficulty we had _____the problem,
| A．to solve | B．solved | C．solving | D．solve |