—I hate talking with that guy. Look, he is coming. What should I do?
—Don’t speak until_______.
| A．speaking | B．spoken to | C．spoken | D．speaking to |
Teachers recommend parents________ their children under 12 to ride bicycles to school for safety.
| A．not allow | B．do not allow | C．mustn’t allow | D．couldn’t allow |
For many years, people________ electric cars. However, making them has been more difficult than predicted.
| A．dream of | B．had dreamed of | C．dreamed of | D．have dreamed of |
In April, thousands of holidaymakers remained________ abroad due to the volcanic ash cloud.
| A．sticking | B．to be stuck | C．stuck | D．to have stuck |
—How did you like Nick’s performance last night?
—To be honest, his singing didn’t ________to me much.
| A．appeal | B．belong | C．refer | D．occur |
Mark________have hurried. After driving at top speed, he arrived half an hour early.
| A．needn’t | B．wouldn’t | C．mustn’t | D．couldn’t |