I remember a _____ famous scientist said that we should believe in ourselves first of all.
| A．some | B．certain | C．sure | D．other |
—Mike, I can't find my watch anywhere.
—You ________ it while working out.
| A．may have lost | B．could have lost |
| C．would have lost | D．should have lost |
—Where did you get this book?
—I picked it up from a secondhand bookshop if you ________ know.
| A．must | B．will |
| C．can | D．shall |
Jack is an outgoing child, usually kind and helpful, but he ________ lose temper sometimes.
| A．must | B．would |
| C．can | D．should |
________ a little earlier, you could have got a copy of his latest book.
| A．If you would arrive | B．If you arrived |
| C．Should you arrive | D．Had you arrived |
What's your opinion of Mr Li's request that we ________ spend half an hour reading English aloud every morning?
| A．must | B．would |
| C．should | D．could |