Melting ice（融冰）can cause sea levels to rise． Since 1993， sea levels _______ at a speed of 3.2 cm every 10 years． （ ）
A．roseB．have risenC．rise
—Bob，please ________ your spelling.You've dropped the "d" in the word "knowledge".
—Oh，yes.I'll be more careful next time.
A．listen toB．look forward to
C．pay attention toD．get used to
My classmate is running so fast!I ________ believe my eyes.
A．can'tB．needn'tC．mustn'tD．shouldn't
There ________ a concert in our school hall next week.
A．isB．wasC．will beD．will have
Try this dress on，Lucy.It must look nice ________ you.
A．onB．inC．atD．with
Walking is good for health.So I ________ go to school on foot.
A．everB．neverC．seldomD．often