The old man stood there with his eyes ______ on the picture.
| A．to focus | B．focusing | C．focused | D．focus |
—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 |
Every time she was in trouble, she went to him for help, as he said he ________ do anything for her.
| A．should | B．must |
| C．would | D．might |
—Where did you get The Frog written by Mo Yan?
—I picked it up from a bookshop online if you ________ know.
| A．must | B．will |
| C．can | D．shall |