By the time you wake up tomorrow morning, we _____ in the USA. A.arrive B.arrived C.are arriving D.will have arrived
It made all the Chinese happy _____ China succeeded in sending up the first manned spaceship.
---May I take your order now? ---_______.
She was so angry at all ______ I was doing ______ she walked out.
The old woman had a letter from her son in the army_____ to her.
It was ______ the old clock that the old man spent the whole morning at home.