Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
| A．/, the | B．the, / | C．an, the | D．the, a |
______ a time in the 1960s when young people liked wearing army uniforms.
| A．It was | B．There was | C．It is | D．There is |
I wrote some notes about the meeting _____ it was reasonably fresh in my mind.
| A．if | B．while | C．though | D．before |
What a pity! The car ran out sight before I could _______ its number.
| A．get across | B．get off | C．set aside | D．put down |
--- Recently many people have no intention of buying a house.
--- I think the reason may be ______ the house price is too high.
| A．that | B．why | C．because | D．which |
Parents are advised to take pressure ______ a child and give him encouragement before an exam.
| A．off | B．out | C．from | D．away |