—Must we keep the window _______ all the time?
—No, you don’t have to.
| A．opening | B．opened |
| C．to open | D．Open |
They came to the city the day before yesterday, ______ they?
A. did B. weren’t C. didn’t
There are _______ many books _______ I don’t know which to choose.
A. so; that B. such; that C. too; that
—Listen! Someone is singing in the music room. —Oh! ____ beautiful song!
A. What B. What a C. How
To my ______, all the people came to the meeting though it was raining hard.
A. surprise B. surprisedC. surprising
I’ll call you as soon as Tom ______ back tomorrow.
A. comes B. will come C. has come