Only in this way _________ learn this language well.
| A．you will | B．you can | C．can you | D．have you |
We ______ the difficulty together, but why didn’t you tell me?
| A．should face | B．might face | C．could have faced | D．must have faced |
______ at the door before you enter my room, please.
| A．Knock | B．Knocking | C．Knocked | D．To knock |
Our friendship _____ quickly over the weeks that followed.
| A．had developed | B．was developing | C．would develop | D．developed |
—Have you heard about that fire in the market?
— Yes, fortunately no one _____.
| A．hurt | B．was hurt | C．has hurt | D．had been hurt |
Many people have donated that type of blood; however, the blood bank needs _____.
| A．some | B．less | C．much | D．more |