The teacher recommended that the students ______ the following books.
| A．read | B．reading |
| C．to read | D．must read |
He paid for a seat, when he _____ have entered free.
| A．could | B．would | C．must | D．need |
—Do you know where David is? I couldn’t find him anywhere.
—Well. He _____have gone far—his coat’s still here.
| A．shouldn’t | B．mustn’t | C．can’t | D．wouldn’t |
If the new arrangement doesn’t _____, we’ll go back to the old one.
| A．work over | B．work out | C．work up | D．work down |
All the girls swam in the lake except two, who _____ halfway.
| A．gave off | B．gave up | C．gave away | D．gave out |
We’re so busy that no one in the office can _____ for any other work.
| A．spare | B．be spared | C．share | D．be shared |