Students are required to go out in couples, especially in the evenings, with friends ______ they get into trouble．
| A．even if | B．if only | C．in case | D．when |
Oh, Janne, you’ve broken another glass. You ought ＿＿＿＿when you washed it.
| A．be careful | B．to care | C．have cared | D．to have been careful |
Without electricity human life＿＿＿＿＿＿＿quite different today.
| A．is | B．will be | C．would have been | D．would be |
You didn’t let me drive. If we＿＿＿＿in turn, you＿＿＿ so tired.
| A．drove； didn’t get | B．drove； wouldn’t get |
| C．were driving； wouldn’t get | D．had driven； wouldn’t have got |
What would have happened＿＿＿＿, as far as the river bank?
| A．if Bob has walked farther | B．if Bob should walk farther |
| C．had Bob walked farther | D．if Bob walked farther |
—— Will you stay for lunch?
—— Sorry, ＿＿＿＿＿. My brother is coming to see me.
| A．I mustn’t | B．I can’t | C．I needn’t | D．?won’t |