.The train ＿＿＿＿＿ at the present speed until it reaches the foot of the mountain at about nine o’clock tonight.
| A．went | B．is going | C．goes | D．will be going |
She didn't come to the party last Sunday. ________， she must have made the party more exciting.
| A．If she came | B．Would she come |
| C．Had she come | D．Did she come |
Students ________ remain in their seats until all the papers have been collected.
| A．would | B．shall |
| C．will | D．could |
—Did Ann fail in English?
—She ________. Don't you notice that she looks depressed?
| A．might | B．must |
| C．may have | D．could have |
I wrote a letter to John for his help during my high school years，without which I ________ the college entrance exam.
| A．would fail | B．would have failed |
| C．should fail | D．must have failed |
________ me what you wanted to know, I should not have wasted my time talking so much with you.
| A．Had you told | B．You have told |
| C．You had told | D．Have you told |