He paid for a seat, when he _________ have entered free.
| A．could | B．would | C．must | D．need |
_______ she was invited to the ball made her very happy.
| A．Whether | B．That | C．Because | D．What |
She told us what she bought yesterday ________ a few apples and some clothing.
| A．is | B．are | C．was | D．were |
It’s said to be a case of murder_______ the children were used by adults.
| A．when | B．where | C．which | D．that |
I had meant to meet you at the airport this morning but I was too busy for I_______ a report.
| A．wrote | B．was writing | C．have written | D．had written |
Jerry has promised to keep the secret, so he won’t tell anyone _____ asked to.
| A．until | B．now that | C．unless | D．even though |