—Why are you so depressed?
—I _____ my MP4 player on the bus.
| A．had lost | B．am lost | C．have lost | D．was lost |
The tourists, had enjoyed themselves so much in the botanic garden, were worn out。
| A．all of what | B．all of which |
| C．all of them | D．all of whom |
We can hardly believe such a young boy ______ travel around the world all by himself.
| A．may | B．need | C．should | D．must |
My friend Jack was the first person I knew ______an iPhone 5S.
| A．using | B．to use | C．used | D．having used |
They hope to turn our society into one ______ those in need can get help.
| A．where | B．which | C．when | D．who |
My opinion is ________the same as yours.
| A．and so on | B．on the other hand |
| C．at risk | D．on the whole |