l) In the course of further scientific developments extensive use will be made of modern computing machines and electronic devices. 2) Mention has already been made of this new phenomenon. 3) The experiment had been carried out by prof. Zaicrevstey by 6 o'clock yesterday. 4) The opening session of the Congress was preceded by a meeting of the General Assembly to elect a new president. 5) When he entered the laboratory a new device was being tested. 6) It is often argued that in the XX century we are left with no expansion of wisdom and with greater need for it. 7) No attempts have been made to list all the contributions in which different procedures have been developed and later used. 8) The data are being collected and studied now. 9) The article had been translated by the time the chief of the laboratory came back. 10) So far no notice has been taken of the obvious advantage of this technique. 11) The candidate thesis is submitted. 12) More evidence will be obtained to support the idea. 13) When he returned to the university an interesting experiment was being made. 14) The report has been listened to with great attention. 15) The hypothesis was proposed by Petrov after a number of experiments. 16) The work will have been finished by noon tomorrow. 17) The experiment had been carried out by 6 o'clock yesterday. 18) These ideas are hardly recognized as mathematics at all by the people trained in the classical branches of the subject. 19) Recent discoveries in all sciences have been greatly assisted by the developments in contemporary research techniques. 20) More exact methods are being developed now for obtaining lower temperature. 21) The discovery was made by the team of our laboratory. 22) The article has been published.