Depression is the leading cause of suicide, __ __ in turn is the third leading cause of death among 15 to 24 year olds in the United States．
| A．who | B．which | C．that | D．what |
26. _______we cannot get seems better than_____________we have.
| A．What, what | B．What , that. | C．That, what | D．That, that |
25. Jack is not feeling well this morning because he had breakfast.
| A．too much, much too | B．much too, too much |
| C．much too, too much | D．too much, too much |
24. you’ d better I think _________him a hand when necessary .
| A．give | B．to give | C．gave | D．Given |
23. Mary___________the job offered to her, but she didn’t.
| A．cannot take | B．ought to have taken | C．should | D．must have taken |
22. Many teachers don’ t want their students to_________doing too much homework.
| A．keep busy | B．be kept busy | C．keep busying | D．be kept busying |