The old house, in front of _________ there is an apple tree, is _________ I used to live.
| A．that, the place | B．it, the place | C．which, where | D．what, where |
It’s good that we _____ to the park because it’s started to rain.
| A．don’t go | B．hadn’t gone |
| C．didn’t go | D．wasn’t going |
Look at that little boy wandering about — perhaps he _____ his mother.
| A．will lose | B．is losing |
| C．had lost | D．has lost |
“Did Jim come?” “I don’t know. He _______ while I was out.”
| A．might have come | B．might come |
| C．mush have come | D．should have come |
“Look at these tracks. It _______ be a wolf.” “Don’t be so sure. I think it _______ be a fox.”
| A．must; could | B．may; might |
| C．need; must | D．could; need |
“Show me your permit, please.” “Oh, it’s not in my pocket. It ______.”
| A．might fall out | B．could fall out |
| C．should have fallen out | D．must have fallen out |