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
What the public is about is whether medical workers and scientists will be able to find a cure for the new disease in a short time.
A. concerning B. concern C. concerned D. to concern
