— What about ______ bike?
— Do you think it all right to buy him that bike as ______ birthday gift?
| A．a; a | B．the; a | C．a; / | D．the; / |
You can see the stars on a clear night, but in the daytime they are _____
| A．unbelievable | B．invisible | C．inaccessible | D．unavailable |
I_______ such a foolish mistake if I had been a little more careful.
| A．wouldn’t make | B．wouldn’t have made |
| C．hadn’t made | D．didn’t make |
Look over there—there’s a very long, winding path _____ up to the house.
| A．leading | B．leads | C．led | D．to lead |
I was out of town at the time, so I don’t know exactly how it _______.
| A．was happening | B．happened | C．happens | D．has happened |
So sudden ________ that the enemy had no time to escape.
| A．did the attack | B．the attack did | C．was the attack | D．the attack was |