___ the morning of June 27, they visited the Great Wall.
| A．In | B．At | C．On | D．From |
They had ________ in keeping in touch with each other that they decided to move to the same city.
| A．such many difficulties |
| B．such much difficulty |
| C．so many difficulty |
| D．so much difficulty |
--Is this the office ________ your parents are working now?
--No. They are working in the next one.
| A．in which | B．in where |
| C．that | D．which |
About seventy percent of the population in China _______ farmers.
| A．is | B．be | C．are | D．will be |
--I saw Mr. Smith at Wuhan Station this morning.
--You ________ have made a mistake. He’s still on holiday in Canada.
| A．can | B．must |
| C．can’t | D．needn’t |
The girl student ________ to stay at home rather than go to the concert with the naughty boy.
| A．enjoys | B．considers |
| C．prefers | D．looks forward |