Only after they had discussed matter for several hours ___ a decision.
| A．they reached |
| B．did they reach |
| C．they reach |
| D．do they reach |
Even though I’d hurt my leg, I＿＿＿＿＿＿ swim back to the river bank.
| A．could | B．might | C．had to | D．was able to |
—— Do you think he will do me a favor?
—— As far as I know, he is the last one to help others. He＿＿＿＿be prepared to give you a hand,
though.
| A．might | B．must | C．can | D．should |
If you＿＿＿＿wait a moment, I’ll go and find our manager.
| A．can | B．should | C．will | D．must |
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 |