--You didn’t wait for Mike last night, did you?
---No, and we____ for him. He didn’t return home at all.
| A．didn’t need to wait | B．needn’t waiting |
| C．needn’t have waited | D．didn’t need wait |
Many years have been spent by him how to solve the question.
| A．to learning | B．with learning | C．learning | D．on learning |
It was some timewe realized the truth．
| A．when | B．until | C．since | D．before |
Tom was ______ that he couldn’t understand ______ difficult sentence.
| A．so a stupid boy; such | B．a so stupid boy; a such |
| C．so stupid a boy; a such | D．so stupid a boy; such a |
_______ done for us?
| A．What do you think he has | B．What do you think has he |
| C．Do you think what has he | D．Do you think what has he |
takes me several hours my tasks. Because they are too difficult.
| A． It , to finish | B．That, to finish | C．It ,finishes | D．It ,finishing |