They form a polar molecule, ____ is, ____ with a slightly positive end and a slightly negative end.
| A．which; that | B．it; one | C．that; one | D．one; that |
—That must have been a long trip.
—Yeah, it _____ us a whole week to get there.
| A．takes | B．has taken | C．took | D．was taking |
Between the two parts of the concert is an interval, _____ the audience can buy ice-cream.
| A．when | B．where | C．that | D．which |
He decided that he would drive all the way home instead of _____at a hotel for the night .
| A．putting down | B．putting off | C．putting on | D．putting up |
All of us still remember the terrible tsunami that _____ the areas in the southeast of Asia in 2004.
| A．attacked | B．struck | C．knocked | D．beat |
Since people are fond of humor, it is as welcome in conversation as _____ else.
| A．anything | B．something | C．anywhere | D．somewhere |