21[单选题,1.3分] She is a ______ person and does not want to live on charity.

16[单选题,1.3分] If the market is left ____________, there will sometimes be shortages or over-production.

2[单选题,1.3分] Though she _____ and pleaded, he refused to go to the dance.

[单选题,1.3分] He just does ______ he pleases and never thinks about anyone else.

[单选题,1.3分] _________ he followed my advice, he would have succeeded.

[单选题,1.3分] If you want a friend, you’ll find _____ in me.

单选题,9分] Scientists say it may be five or ten years _______ it is possible to test this medicine on human patients.

_________ in a person’s speech or writing usually ranges on a continuum from casual or colloquial to formal or polite according to the type of communicative situation.

(单选、25分) Do you want to change this lamp for__________or do you want your money back

If a student has a problem with classroom work，he or she should______.

If a boy or a girl has grown up in a home with sharing tasks and decisions，he or she will probably______.

It is generally considered unwise to give a child___( )_____ he or she wants.