________ that I was puzzled.
| A．So difficult a question did he ask me |
| B．Such difficult a question did he ask me |
| C．Such a difficult question he asked me |
| D．He asked me a so difficult question |
Every time ______ they met, they would talk several hours together about the persons and things _______ they remembered in the middle school.
| A．that; who | B．when; which |
| C．/; that | D．which; / |
My boss insisted that I _______ the work before ten o’clock tonight.
| A．can finish | B．must finish | C．must have finished | D．finish |
The country has _______ great changes and become a developed one.
| A．gone over | B．gone out | C．gone through | D．gone with |
We are often _____ by the doctors to eat more healthy food and take plenty of physical exercise.
| A．suggested | B．insisted | C．approved | D．advised |
We asked the teacher to explain _______.
| A．us the sentence | B．us of the sentence |
| C．the sentence to us | D．the sentence for us |