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 |
down the radio a little—the baby is sleeping.
| A．Turning | B．Turn | C．To turn | D．Turned |
—Who’s knocking at the door?
—Maybe wanting to sell some new products.
| A．everyboby | B．anybody | C．somebody | D．noboby |
The house could fall down soon if no one some quick repair work.
| A．has done | B．is doing | C．does | D．had done |
My cell-phone has disappeared. Who have taken it away?
| A．could | B．should | C．must | D．might |
We can imagine city of Wuhan in year 2030 will be different from what it is now.
| A．the; / | B．/;the | C．/ ; / | D．the; the |