---Your grandfather still seems very energetic, although he is already in his seventies now.
---Yes, he _______in the army for three years when he was young.
| A．would serve | B．served |
| C．had served | D．has served |
Could I speak to_______is in charge of International Sales please?
| A．who | B．what | C．whoever | D．whatever |
A modern city has been set up in_______was wasteland ten years ago.
| A．what | B．which | C．that | D．where |
It has been a long time for human to make _____ to reach the moon.
| A．its easy | B．it’s possible | C．it truth | D．it possible |
—Hi, Tom. Any idea where Jane is?
—She_______in the classroom. I saw her there just now.
| A．shall be | B．should have been | C．must be | D．must have been |
The boy_______on the ground_______that he_______the book on the table.
| A．lied;lied;laid | B．lying;lied;laid | C．lied;lay;lay | D．lying;laid;lay |