I into robots and used to make mobile phones as well as help with medical operations.

I        into robots and used to make mobile phones as well as help with medical operations.

#102747

have put

have been put

had put

had been put

推荐题目

——Will you come to my office when you      your work?  ——Sure.

#103289

finished

are finishing

have finished

will finish

  I don’t know if he ____ us; if he ____, I’ll let you know.

#103662

will come and help; comes

comes and helps; will come

will come and help; will come

comes and helps; comes

—How long _______  in Shanghai?—I will be there attending a conference and giving a speech, which will take about 3 days.

#102207

have you stayed

are you staying

do you stay

did you stay

The environment will be further polluted unless some measures _____.

#100612

are taken

will be taken

are being taken

should be taken

 With the help of high technology, more and more new substances ______ in the past years.

#104082

discovered

have discovered

had been discovered

have been discovered

共5993题