My sister was very unhappy for _______ to the party.
| A．having not been invited | B．not having invited |
| C．having not invited | D．not having been invited |
They asked the government to make ______clear to the public ______ they did was right.
| A．it; that what | B．it; that | C．that; what | D．this; that |
The reason why he failed is ______ he was too careless.
| A．because | B．that | C．for | D．because of |
We were about to climb up to the top of the mountain ________ it began to rain heavily.
| A．as | B．while | C．when | D．since |
—How do you find my idea?
—_______.
| A．By opening your notebook. | B．I don’t like it a bit. |
| C．You showed it to me. | D．When I came in, I found it. |
Don’t you think that______________ is no use promising without doing?
| A．this | B．that | C．it | D．what |