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 |
It is surprising that he＿＿＿＿at the meeting.
| A．was | B．be | C．is | D．were |
If only I＿＿＿＿＿how to operate a computer as you do!
| A．had known | B．wou欤?know | C．should know | D．knew |
The general ordered that the thief＿＿＿＿.
| A．be punished | B．would punish | C．would be punished | D．should punish |
When a pencil is partly in a glass of water, it looks as if ＿＿＿＿.
| A．breaks | B．has broken | C．were broken | D．had been broken |
He suggests we＿＿＿＿＿＿to the cinema at once, otherwise we will be late.
| A．must go | B．go | C．will go | D．would go |