Social networking is an important factor _______ business success.
| A．devoting to | B．appealing to |
| C．attaching to | D．leading to |
A great number of students ______ said they were forced to practise the piano.
| A．to question | B．to be questioned | C．questioned | D．questioning |
At no time________the first to use the nuclear weapon.
| A．will China be | B．will be China | C．is China | D．China is |
__________ to sun, rain and wind for a long time, the stone split（裂开）.
| A．Being exposed | B．Having exposed | C．Exposed | D．To expose |
The arrangements for the English evening this weekend aren’t all_______；we needed another thirty chairs.
| A．in return | B．in advance | C．in ruins | D．in place |
----Have the Smiths moved to California?
-----Not yet, but they have ____________.
| A．decided to | B．decided it | C．decided | D．decided to move |