All the students __ a loud laugh when the teacher told them the joke.
| A．let off | B．let down | C．let out | D．let up |
If the wound _______ become swollen, do not hesitate to call me.
| A．shall | B．must | C．should | D．Would |
He ______ to get out of trouble, but no one would help him.
| A．succeeded | B．attempted |
| C．managed | D．Offered |
Our class _______ more than 70 students.
| A．builds of | B．is made up |
| C．consists of | D．is consisted of |
No bird and no beast _________ in the lonely island.
| A．are seen | B．is seen |
| C．see | D．Sees |
_______ I always felt I would pass the exam, I never thought I would get an A.
A. While B. Once C. If D. Until