He hurried to the station,＿＿＿the 9：30 train had already left.
| A．to find | B．found | C．only to find | D．only finding |
--Was Tom there when you arrived?
--Yes, but he___________ home soon afterwards.
| A．had gone | B．has gone | C．is | D．went |
—Look at these tracks. It __________ be a wolf.
—It needn't be. It ___________ be a fox.
| A．must; could | B．may; might |
| C．need; must | D．could; need |
Travelers_______________ that they should bring their ID cards with them.
| A．have reminded | B．are reminded |
| C．were reminding | D．had been reminded |
—Our holiday cost a lot of money.
—Did it? Well, that doesn't matter____________ you enjoyed yourselves.
| A．unless | B．in case | C．as far as | D．as long as |
— 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 |