--- ____ you _____ of the pop singer called Justin Bieber?
--- Yes, I have. His voice sounds_____.
| A．Did; hear; beautifully | B．Have; heard; beautifully |
| C．Did; heard; beautiful | D．Have; heard; beautiful |
They found difficult to finish the work in such a short time.
| A．this | B．that | C．them | D．it |
--The factory wants to make more cars with _____money.
--I think it's impossible.
| A．fewer | B．less | C．more | D．cheaper |
-- You look_____. Why?--I lost my ID card.
| A．happy | B．sad | C．tired | D．bored |
I met Li Lei_____ hospital last Sunday. He was ill_____ hospital then.
| A．in the, in the | B．in, in the |
| C．in the, in | D．in, in |
The earth will become worse and worse ________ we do something to stop her from being polluted.
| A．if | B．even if | C．when | D．unless |