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 |
I believe that human cloning is wrong. If we toy with nature, we will have to deal with the _______.
| A．concepts | B．conflicts | C．consequences | D．credits |
The salesman scolded the girl caught ____ and let her off．
| A．to have stolen | B．stealing | C．to steal | D．to be stealing |
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; / |