In my brother's absence, I would like to thank all concerned on his ________.
| A．behalf | B．part | C．business | D．interest |
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 |
My partner wants to keep the company small _____ I’d like to expand it.
| A．and | B．or | C．however | D．while |
With the successful launch of Tiangong-I, which was ______ breakthrough in space field, China's space dream took a step closer to ______ reality.
A. a; / B. the; a C. a; the D the; /