22、The book was written in 1946,         the education system has witnessed great charges.

A．when               B．during which

C．since then           D．since when

21、

In this seaside resort, you can          all the comfort and convenience of modern tourism.

A．enjoy               B．apply

C．receive              D．achieve

20、The country has already sent up three unmanned spacecraft, the most recent          at the end of last March.

A．has been launched     B．having been launched

C．being launched        D．to be launched

19、They          two free tickets to Canada, otherwise they’d  never have been able to afford to go.

A．had got     B．got     C．have got    D．get

18、It is not socially          for parents to leave children unattended at that age.

A．accessible   B．adorable

C．adaptable    D．acceptable

17、

---Where did you get to know her?

---It was on the farm          we worked.

A．that        B．there

C．which      D．where

16、          I really don’t like art, I find his work impressive.

A．As             B．Since

C．If              D．While

15、

I have offered to point the house          a week’s accommodation.

A．in exchange for   B．with regard to

C．by means of      D．in place of

14、

I can’t say which wine is beat―it’s a (n)          of personal taste.

A．affair    B．event    C．matter   D．variety

13、Please remain          until the plane has come to a complete stop.

A．to seal   B．to be seated   C．seating  D．seated