It was several minutes _______ we realized what was happening~our dog was trapped in a newly-dug tunnel.
| A．since | B．before | C．until | D．while |
I’m glad I went over all my notes; otherwise _____ .
| A．I may have failed | B．I’d fail |
| C．I’d have failed | D．I’ll have failed |
--- “Have you ever been to Beijing?”
--- “No, but I wish I _____”
| A．have | B．will | C．do | D．had |
A few minutes earlier and we _____ the rain.
| A．have caught | B．had caught |
| C．could have caught | D．were to catch |
I _____ you some money, but I hadn’t any on me then.
| A．would lend | B．would have lent | C．could lend | D．may have lent |
He treated me as though/as if _____ his own son.
| A．I am | B．I would be | C．I was | D．I were |