He was working quietly, with all his attention _______ on the task.
| A．was fastened | B．fastening | C．to fasten | D．fastened |
— Did you know any French before you arrived in Washington?
— Never ______ it, actually.
| A．had I learned | B．have I learned | C．I learned | D．was I learning |
She was such a proud person that she would die ______ she would admit she was wrong.
| A．rather than | B．until | C．after | D．before |
— Did your sister pass the exam?
— She failed and is in low spirits.
— I'm sorry for her.
— ______.
| A．Thank you | B．You're welcome | C．I would think so | D．Never mind |
He is only too ready to help others, seldom, ______, refusing them when they turn to him.
| A．if never | B．if ever | C．if not | D．if any |
— How’s your tour around the North Lake? Is it beautiful?
— It ______ be, but it is now heavily polluted.
| A．will | B．would | C．should | D．must |