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 |
Our monitor always comes to our help when we get into trouble _______ she is very busy.
| A．since | B．once |
| C．even if | D．if |
Can you tell me when the plane _______ to Hong Kong this evening?
| A．would fly | B．has flown |
| C．is flying | D．had flown |
As neither of the two nations would _______, no agreement was reached that day.
| A．give up | B．give away |
| C．give back | D．give in |
It was because of your attitude to your parents _______ they felt so upset.
| A．what | B．that | C．who | D．so that |
Every year _______ foreign visitors come to Beijing to pay a visit to the places of interest.
| A．tens of thousands of | B．ten thousands of |
| C．ten thousands | D．thousands upon thousands |