The government is _____ and will take the necessary steps to maintain security and stability.
| A．on the alert | B．out of control | C．on guard | D．in vain |
You ought to _______ us with rice and dishes of vegetables, but you didn't.
| A．provide | B．have given | C．offer | D．have served |
It is time for class to start. The teacher __________ be in the classroom now.
A. can B. should C would D. shall
The opening day of Expo 2010 Shanghai Chi
na we have been forward looking to_____ to arrive.
| A．being | B．be | C．is | D．will |
_________the peace talk between the two countries will break down depends on your attitude.
| A．If | B．Whether | C．Weather | D．That |
It was __________ you had done ________made it possible for you to improve your English.
| A．that/ that | B．that / what | C．what/ what | D．what/ that |