-----Did Mary come to the party?
---I don’t know．She _____while I was out．
| A．may have come | B．must have come |
| C．might come | D．could come |
Neither the old lady nor her cats ___ out of the house since her husband passed away last month.
| A．was stepping | B．have stepped |
| C．stepped | D．has stepped |
After supper, he usually stood near the window, ___ he could see the tower, the tallest building of the town.
| A．from which | B．from where |
| C．on which | D．on where |
Jack is believed _____ his goal, who is said ____ the stage.
| A．to achieve; to leave |
| B．having achieved; to have left |
| C．to achieve; having left |
| D．to have achieved; to have left |
I’m not sure ___ I can learn at present; but I’m sure it will be something ___ I might use in the future.
| A．That; what | B．what; / |
| C．which; that | D．/; that |
I wonder if John has forgotten my number. I ___ him to call for the past two hours.
| A．have been expecting | B．have expected |
| C．have been expected | D．expected |