Условие:
1. The engineer (to explain) the operation of this device now. 2. Each scientist usually (to run) his test under different conditions. 3. The talk (to bring about) a discussion at the last conference. 4. If the atom (to have) a shortage of electrons, it will have a positive charge. 5. Our laboratory (to develop) a new semiconductor device this month. 6. Last night he (to speak) in favour of our suggestion.

