Поставьте предложения в Present Perfect.1) I (read) books of English writers. 2) He (not take) my bag. 3) You (be) to London? Yes, I... 4) Sam and Polly (not write) a letter abroad. 5) Children (swim) in the pool this morning. 6) John (finish) his work yet? No, he... 7) Many tourists (visit) Moscow this year. 8) I (not speak) with him since childhood. 9) Mary (eat) in the restaurant? 10) After university he (become) a famous scientist.