The police recommended parents __________their children under 12 to ride to school for safety.
| A．not allow | B．do not allow | C．mustn’t allow | D．couldn’t |
allow
As soon as she saw her boyfriend, she ________ crying.
| A．burst into | B．broke out | C．burst out | D．broke in |
—May I ask a question after class，Sir?
—, but not during my lunch break.
| A．I am sorry | B．Anytime | C．Go ahead | D．Certainly |
The scientists have made _______ possible for us to communicate with each other more easily.
| A．it | B．that | C．this | D．them |
You’d better your score and see if you have passed the exam.
| A．add up to | B．add to | C．add up | D．Add |
The second book ________ I want to read is Business at the Speed of Thought.
| A．which | B．that | C．what | D．As |