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 time we 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
They must be working because they have a lot of work to do yesterday.
A. any moment B. at the moment C. just a moment D. the moment
