单项选择（每题1分）
—Listen！It is raining.
—Oh， really！ I______ it at all.
| A．didn’t realize | B．don’t realize |
| C．haven’t realized | D．hadn’t realized |
— Are you coming to my wedding ceremony?
— _____ I can’t miss your prettiest and happiest moment.
| A．I’m afraid I can’t. | B．You’re welcome. | C．No way! | D．You bet! |
— What’s the matter with you?
— After the long walk, my legs _______ and I couldn’t even take one more step.
| A．gave out | B．wore out | C．ran out | D．tired out |
Please keep ______; I’m taking a photo of you all. Say “Cheese”.
| A．calm | B．still | C．quiet | D．silent |
. Just like a voyage at sea, our life journey, ______ time is limited, is full of difficulties as well as opportunities.
| A．what | B．of which | C．while | D．whose |
— How could they keep us waiting for so long?
— They got on the bus half an hour ago and they ________ be here in ten minutes, I think.
| A．might | B．would | C．should | D．must |