How long do you think it will be China becomes a rich and harmonious country?
| A．before | B．after | C．since | D．when |
The United States signed up on Friday for the 2010 Shanghai World Expo, _________ it the last major country to join the event．
| A．making | B．made | C．to make | D．having made |
The spokesman did not give out the details of the message, saying, “it should not be made public as it is a ______ issue”．
| A．basic | B．current | C．sensitive | D．sensible |
It was in the remote mountain areas ______ I spent the gap year ______ I learned how to work with a group of strangers and how to look after myself．
| A．when; that | B．where; that | C．where; when | D．that; where |
______ your blog, I would have written back two days ago．
| A．If I read | B．Should I read | C．Had I read | D．If I could have read |
Either you or one of your students _________ to attend the meeting that is due tomorrow．
| A．are | B．be | C．have | D．is |