He commanded the students ______ the classroom before he returned.
| A．did not leave | B．leave not | C．not to leave | D．not leaving |
The new teaching building ______ by the end of last month.
| A．has been designed | B．had been designed |
| C．was designed | D．would be designed |
Was it because Jack come late for school ______ Mr Smith got angry?
| A．why | B．who | C．where | D．that |
Most American children go to state schools, but the private schools ______ be very good.
| A．must | B．can | C．should | D．may |
Children should make ______ a rule to wash hands before meals.
| A．one | B．that | C．it | D．this |
— I have never been to the United States before.
— ______! Your spoken English is amazing.
| A．You can’t be serious | B．You got it |
| C．I couldn’t agree more | D．I am not surprised at all |