His friends go to Beidaihe by train _______vacation every year.
| A．at | B．of | C．on | D．in |
—I am too tired to walk any farther, Jack.
—______, Daniel. You can do it.
| A．No hurry | B．No problem | C．That’s all | D．Come on |
I don’t know ______ Apple iphone4s.
| A．that she is so crazy about |
| B．what is she so crazy about |
| C．why she is so crazy about |
| D．how she is so crazy about |
I hate people ______ talk much but do little.
| A．who | B．which | C．whose | D．whom |
—Could we go and watch the football game?
—No, ______ you have the tickets.
| A．if | B．unless | C．because | D．since |
—Can I go to the park, Mum?
—Certainly. But you ______ be back by six o’clock.
| A．can | B．may | C．might | D．must |