.He went there on foot and got very tired, but he _____ by bus. The fare was rather cheap.
| A．could have gone | B．must have gone |
| C．ought have gone | D．will have gone |
He said, “＿＿＿＿＿ a long way to school. ＿＿＿＿＿ a long way to go yet before we arrived.”
| A．It is ； There is | B．There is ； It is |
| C．It is ； It is | D．There is； There is |
It’s the third time ＿＿＿＿＿ arrived late this month.
| A．that you | B．when you | C．that you’ve | D．when you’ve |
Our classroom is very clean. Do you know who＿＿＿cleaned it?
| A．was it that | B．it was that | C．was it who | D．he was |
—— Was that the new comer who walked by?
—— ＿＿＿＿＿.
| A．It must be that | B．It must have been | C．He must be | D．This must have been |
＿＿＿＿being March 12th, they planted trees on the hill.
| A．That | B．It is | C．It | D．This |